/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:57:24,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:57:24,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:57:24,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:57:24,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 21:57:24,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:57:24,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:57:24,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:57:24,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:57:24,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:57:24,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:57:24,928 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:57:24,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:57:24,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:57:24,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:57:24,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:57:24,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:57:24,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:57:24,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:57:24,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:57:24,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:57:24,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:57:24,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:57:24,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:57:24,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:57:24,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:57:24,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:57:24,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:57:24,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:57:24,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:57:24,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:57:24,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:57:24,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:57:24,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:57:24,931 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:57:24,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:57:24,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:57:25,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:57:25,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:57:25,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:57:25,176 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:57:25,178 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:57:25,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl [2021-06-05 21:57:25,179 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl' [2021-06-05 21:57:25,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:57:25,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:57:25,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:57:25,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:57:25,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:57:25,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:57:25,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:57:25,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:57:25,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:57:25,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... [2021-06-05 21:57:25,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:57:25,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:57:25,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:57:25,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:57:25,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:57:25,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:57:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:57:25,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:57:25,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:57:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:57:25,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:57:25,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:57:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:57:25,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:57:25,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 21:57:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 21:57:25,319 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 21:57:25,319 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:57:25,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:57:25,663 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 21:57:25,664 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:57:25 BoogieIcfgContainer [2021-06-05 21:57:25,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:57:25,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:57:25,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:57:25,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:57:25,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:57:25" (1/2) ... [2021-06-05 21:57:25,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f011eed and model type name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:57:25, skipping insertion in model container [2021-06-05 21:57:25,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:57:25" (2/2) ... [2021-06-05 21:57:25,669 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-subst.wvr.bpl [2021-06-05 21:57:25,672 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:57:25,673 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:57:25,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:57:25,673 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:57:25,712 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 21:57:25,726 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 21:57:25,753 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:57:25,754 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:57:25,754 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:57:25,754 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:57:25,754 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:57:25,754 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:57:25,754 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:57:25,754 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:57:25,763 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-05 21:57:25,781 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:25,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:25,792 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:25,792 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:25,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-06-05 21:57:25,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:25,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439769538] [2021-06-05 21:57:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:26,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:26,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439769538] [2021-06-05 21:57:26,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439769538] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:26,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:26,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:26,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035465479] [2021-06-05 21:57:26,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:26,047 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:26,391 INFO L93 Difference]: Finished difference Result 399 states and 1111 transitions. [2021-06-05 21:57:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:26,409 INFO L225 Difference]: With dead ends: 399 [2021-06-05 21:57:26,409 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 21:57:26,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:57:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 21:57:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 147. [2021-06-05 21:57:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.863013698630137) internal successors, (418), 146 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 418 transitions. [2021-06-05 21:57:26,466 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 418 transitions. Word has length 17 [2021-06-05 21:57:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:26,467 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 418 transitions. [2021-06-05 21:57:26,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 418 transitions. [2021-06-05 21:57:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:26,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:26,469 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:26,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:57:26,470 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:26,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash 540971640, now seen corresponding path program 2 times [2021-06-05 21:57:26,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:26,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464075466] [2021-06-05 21:57:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:26,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:26,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464075466] [2021-06-05 21:57:26,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464075466] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:26,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:26,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:26,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262516699] [2021-06-05 21:57:26,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:26,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:26,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:26,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:26,599 INFO L87 Difference]: Start difference. First operand 147 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:26,856 INFO L93 Difference]: Finished difference Result 375 states and 1007 transitions. [2021-06-05 21:57:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:26,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:26,858 INFO L225 Difference]: With dead ends: 375 [2021-06-05 21:57:26,858 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 21:57:26,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 21:57:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 171. [2021-06-05 21:57:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.864705882352941) internal successors, (487), 170 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 487 transitions. [2021-06-05 21:57:26,865 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 487 transitions. Word has length 17 [2021-06-05 21:57:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:26,866 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 487 transitions. [2021-06-05 21:57:26,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 487 transitions. [2021-06-05 21:57:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:26,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:26,867 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:26,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:57:26,867 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:26,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1605199120, now seen corresponding path program 3 times [2021-06-05 21:57:26,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:26,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918821833] [2021-06-05 21:57:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:26,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918821833] [2021-06-05 21:57:26,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918821833] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:26,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:26,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:26,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832273433] [2021-06-05 21:57:26,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:26,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:26,958 INFO L87 Difference]: Start difference. First operand 171 states and 487 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:27,192 INFO L93 Difference]: Finished difference Result 358 states and 984 transitions. [2021-06-05 21:57:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:27,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:27,194 INFO L225 Difference]: With dead ends: 358 [2021-06-05 21:57:27,194 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 21:57:27,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 21:57:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 180. [2021-06-05 21:57:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.8547486033519553) internal successors, (511), 179 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 511 transitions. [2021-06-05 21:57:27,202 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 511 transitions. Word has length 17 [2021-06-05 21:57:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:27,202 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 511 transitions. [2021-06-05 21:57:27,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 511 transitions. [2021-06-05 21:57:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:27,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:27,203 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:27,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:57:27,203 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:27,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1741639554, now seen corresponding path program 4 times [2021-06-05 21:57:27,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:27,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241080970] [2021-06-05 21:57:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:27,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:27,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241080970] [2021-06-05 21:57:27,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241080970] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:27,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:27,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:27,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139069244] [2021-06-05 21:57:27,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:27,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:27,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:27,308 INFO L87 Difference]: Start difference. First operand 180 states and 511 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:27,603 INFO L93 Difference]: Finished difference Result 510 states and 1384 transitions. [2021-06-05 21:57:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:27,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:27,605 INFO L225 Difference]: With dead ends: 510 [2021-06-05 21:57:27,605 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 21:57:27,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 21:57:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 196. [2021-06-05 21:57:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.958974358974359) internal successors, (577), 195 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 577 transitions. [2021-06-05 21:57:27,613 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 577 transitions. Word has length 17 [2021-06-05 21:57:27,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:27,613 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 577 transitions. [2021-06-05 21:57:27,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 577 transitions. [2021-06-05 21:57:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:27,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:27,614 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:27,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:57:27,614 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1174687474, now seen corresponding path program 5 times [2021-06-05 21:57:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:27,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412685257] [2021-06-05 21:57:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:27,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:27,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412685257] [2021-06-05 21:57:27,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412685257] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:27,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:27,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137497962] [2021-06-05 21:57:27,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:27,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:27,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:27,702 INFO L87 Difference]: Start difference. First operand 196 states and 577 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:27,957 INFO L93 Difference]: Finished difference Result 464 states and 1270 transitions. [2021-06-05 21:57:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:27,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:27,960 INFO L225 Difference]: With dead ends: 464 [2021-06-05 21:57:27,960 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 21:57:27,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 21:57:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 196. [2021-06-05 21:57:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.943589743589744) internal successors, (574), 195 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 574 transitions. [2021-06-05 21:57:27,977 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 574 transitions. Word has length 17 [2021-06-05 21:57:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:27,977 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 574 transitions. [2021-06-05 21:57:27,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 574 transitions. [2021-06-05 21:57:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:27,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:27,978 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:27,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:57:27,978 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1412132048, now seen corresponding path program 6 times [2021-06-05 21:57:27,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:27,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758158303] [2021-06-05 21:57:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:28,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:28,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758158303] [2021-06-05 21:57:28,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758158303] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:28,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:28,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:28,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503567598] [2021-06-05 21:57:28,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:28,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:28,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:28,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:28,107 INFO L87 Difference]: Start difference. First operand 196 states and 574 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:28,376 INFO L93 Difference]: Finished difference Result 497 states and 1376 transitions. [2021-06-05 21:57:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:28,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:28,378 INFO L225 Difference]: With dead ends: 497 [2021-06-05 21:57:28,378 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 21:57:28,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 21:57:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 202. [2021-06-05 21:57:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 3.0) internal successors, (603), 201 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 603 transitions. [2021-06-05 21:57:28,385 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 603 transitions. Word has length 17 [2021-06-05 21:57:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:28,385 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 603 transitions. [2021-06-05 21:57:28,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 603 transitions. [2021-06-05 21:57:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:28,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:28,386 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:28,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 21:57:28,386 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash -845179968, now seen corresponding path program 7 times [2021-06-05 21:57:28,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:28,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474238033] [2021-06-05 21:57:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:28,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:28,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474238033] [2021-06-05 21:57:28,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474238033] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:28,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:28,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:28,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193577278] [2021-06-05 21:57:28,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:28,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:28,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:28,495 INFO L87 Difference]: Start difference. First operand 202 states and 603 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:28,755 INFO L93 Difference]: Finished difference Result 490 states and 1348 transitions. [2021-06-05 21:57:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:28,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:28,757 INFO L225 Difference]: With dead ends: 490 [2021-06-05 21:57:28,757 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 21:57:28,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 21:57:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 199. [2021-06-05 21:57:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.974747474747475) internal successors, (589), 198 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 589 transitions. [2021-06-05 21:57:28,764 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 589 transitions. Word has length 17 [2021-06-05 21:57:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:28,764 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 589 transitions. [2021-06-05 21:57:28,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 589 transitions. [2021-06-05 21:57:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:28,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:28,765 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:28,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 21:57:28,765 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash -119789648, now seen corresponding path program 8 times [2021-06-05 21:57:28,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:28,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822145277] [2021-06-05 21:57:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:28,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:28,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822145277] [2021-06-05 21:57:28,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822145277] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:28,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:28,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122694084] [2021-06-05 21:57:28,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:28,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:28,850 INFO L87 Difference]: Start difference. First operand 199 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:29,042 INFO L93 Difference]: Finished difference Result 466 states and 1291 transitions. [2021-06-05 21:57:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:57:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:29,044 INFO L225 Difference]: With dead ends: 466 [2021-06-05 21:57:29,044 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 21:57:29,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:29,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 21:57:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 202. [2021-06-05 21:57:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.9950248756218905) internal successors, (602), 201 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 602 transitions. [2021-06-05 21:57:29,051 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 602 transitions. Word has length 17 [2021-06-05 21:57:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:29,052 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 602 transitions. [2021-06-05 21:57:29,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 602 transitions. [2021-06-05 21:57:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:29,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:29,053 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:29,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 21:57:29,053 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash -494987088, now seen corresponding path program 9 times [2021-06-05 21:57:29,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:29,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660566689] [2021-06-05 21:57:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:29,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:29,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660566689] [2021-06-05 21:57:29,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660566689] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:29,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:29,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:29,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874372462] [2021-06-05 21:57:29,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:29,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:29,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:29,145 INFO L87 Difference]: Start difference. First operand 202 states and 602 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:29,333 INFO L93 Difference]: Finished difference Result 460 states and 1287 transitions. [2021-06-05 21:57:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:29,335 INFO L225 Difference]: With dead ends: 460 [2021-06-05 21:57:29,335 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 21:57:29,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 21:57:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 208. [2021-06-05 21:57:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9806763285024154) internal successors, (617), 207 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 617 transitions. [2021-06-05 21:57:29,341 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 617 transitions. Word has length 17 [2021-06-05 21:57:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:29,341 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 617 transitions. [2021-06-05 21:57:29,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 617 transitions. [2021-06-05 21:57:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:29,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:29,342 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:29,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 21:57:29,342 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:29,344 INFO L82 PathProgramCache]: Analyzing trace with hash 19598974, now seen corresponding path program 10 times [2021-06-05 21:57:29,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:29,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254988951] [2021-06-05 21:57:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:29,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:29,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254988951] [2021-06-05 21:57:29,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254988951] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:29,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:29,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:29,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779522891] [2021-06-05 21:57:29,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:29,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:29,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:29,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:29,439 INFO L87 Difference]: Start difference. First operand 208 states and 617 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:29,678 INFO L93 Difference]: Finished difference Result 493 states and 1376 transitions. [2021-06-05 21:57:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:29,680 INFO L225 Difference]: With dead ends: 493 [2021-06-05 21:57:29,680 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 21:57:29,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 21:57:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 215. [2021-06-05 21:57:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-06-05 21:57:29,686 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 17 [2021-06-05 21:57:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:29,687 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-06-05 21:57:29,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-06-05 21:57:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:29,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:29,687 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:29,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 21:57:29,687 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:29,688 INFO L82 PathProgramCache]: Analyzing trace with hash 586551054, now seen corresponding path program 11 times [2021-06-05 21:57:29,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:29,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088428507] [2021-06-05 21:57:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:29,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:29,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088428507] [2021-06-05 21:57:29,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088428507] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:29,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:29,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:29,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498275801] [2021-06-05 21:57:29,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:29,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:29,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:29,762 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:29,971 INFO L93 Difference]: Finished difference Result 493 states and 1363 transitions. [2021-06-05 21:57:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:29,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:29,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:29,973 INFO L225 Difference]: With dead ends: 493 [2021-06-05 21:57:29,973 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 21:57:29,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 21:57:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 212. [2021-06-05 21:57:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.0) internal successors, (633), 211 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 633 transitions. [2021-06-05 21:57:29,979 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 633 transitions. Word has length 17 [2021-06-05 21:57:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:29,979 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 633 transitions. [2021-06-05 21:57:29,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 633 transitions. [2021-06-05 21:57:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:29,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:29,980 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:29,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 21:57:29,980 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 15096248, now seen corresponding path program 12 times [2021-06-05 21:57:29,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:29,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462787740] [2021-06-05 21:57:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:30,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:30,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462787740] [2021-06-05 21:57:30,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462787740] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:30,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:30,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:30,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640608064] [2021-06-05 21:57:30,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:30,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:30,049 INFO L87 Difference]: Start difference. First operand 212 states and 633 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:30,237 INFO L93 Difference]: Finished difference Result 489 states and 1347 transitions. [2021-06-05 21:57:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:30,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:30,239 INFO L225 Difference]: With dead ends: 489 [2021-06-05 21:57:30,239 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 21:57:30,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 21:57:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 212. [2021-06-05 21:57:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.985781990521327) internal successors, (630), 211 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 630 transitions. [2021-06-05 21:57:30,244 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 630 transitions. Word has length 17 [2021-06-05 21:57:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:30,245 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 630 transitions. [2021-06-05 21:57:30,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 630 transitions. [2021-06-05 21:57:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:30,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:30,245 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:30,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 21:57:30,245 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:30,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:30,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1192892344, now seen corresponding path program 13 times [2021-06-05 21:57:30,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:30,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080118926] [2021-06-05 21:57:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:30,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080118926] [2021-06-05 21:57:30,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080118926] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:30,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:30,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:30,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329696714] [2021-06-05 21:57:30,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:30,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:30,325 INFO L87 Difference]: Start difference. First operand 212 states and 630 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:30,535 INFO L93 Difference]: Finished difference Result 498 states and 1397 transitions. [2021-06-05 21:57:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:30,537 INFO L225 Difference]: With dead ends: 498 [2021-06-05 21:57:30,537 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 21:57:30,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 21:57:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 218. [2021-06-05 21:57:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.0276497695852536) internal successors, (657), 217 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 657 transitions. [2021-06-05 21:57:30,543 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 657 transitions. Word has length 17 [2021-06-05 21:57:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:30,543 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 657 transitions. [2021-06-05 21:57:30,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 657 transitions. [2021-06-05 21:57:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:30,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:30,544 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:30,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 21:57:30,544 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1477737184, now seen corresponding path program 14 times [2021-06-05 21:57:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:30,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208963490] [2021-06-05 21:57:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:30,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:30,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208963490] [2021-06-05 21:57:30,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208963490] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:30,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:30,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:30,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993433569] [2021-06-05 21:57:30,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:30,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:30,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:30,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:30,634 INFO L87 Difference]: Start difference. First operand 218 states and 657 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:30,821 INFO L93 Difference]: Finished difference Result 465 states and 1316 transitions. [2021-06-05 21:57:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:30,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:30,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:30,823 INFO L225 Difference]: With dead ends: 465 [2021-06-05 21:57:30,823 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 21:57:30,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 21:57:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 220. [2021-06-05 21:57:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.0319634703196345) internal successors, (664), 219 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 664 transitions. [2021-06-05 21:57:30,830 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 664 transitions. Word has length 17 [2021-06-05 21:57:30,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:30,830 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 664 transitions. [2021-06-05 21:57:30,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 664 transitions. [2021-06-05 21:57:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:30,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:30,831 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:30,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 21:57:30,831 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:30,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2013826360, now seen corresponding path program 15 times [2021-06-05 21:57:30,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:30,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742820103] [2021-06-05 21:57:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:30,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:30,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742820103] [2021-06-05 21:57:30,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742820103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:30,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:30,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:30,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396737023] [2021-06-05 21:57:30,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:30,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:30,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:30,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:30,912 INFO L87 Difference]: Start difference. First operand 220 states and 664 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:31,101 INFO L93 Difference]: Finished difference Result 463 states and 1301 transitions. [2021-06-05 21:57:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:31,103 INFO L225 Difference]: With dead ends: 463 [2021-06-05 21:57:31,103 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 21:57:31,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 21:57:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 222. [2021-06-05 21:57:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.0271493212669682) internal successors, (669), 221 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 669 transitions. [2021-06-05 21:57:31,111 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 669 transitions. Word has length 17 [2021-06-05 21:57:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:31,111 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 669 transitions. [2021-06-05 21:57:31,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 669 transitions. [2021-06-05 21:57:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:31,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:31,113 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:31,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 21:57:31,113 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:31,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1567844280, now seen corresponding path program 16 times [2021-06-05 21:57:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:31,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690001641] [2021-06-05 21:57:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:31,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:31,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690001641] [2021-06-05 21:57:31,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690001641] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:31,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:31,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:31,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540040762] [2021-06-05 21:57:31,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:31,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:31,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:31,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:31,212 INFO L87 Difference]: Start difference. First operand 222 states and 669 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:31,412 INFO L93 Difference]: Finished difference Result 440 states and 1234 transitions. [2021-06-05 21:57:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:31,414 INFO L225 Difference]: With dead ends: 440 [2021-06-05 21:57:31,414 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 21:57:31,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 21:57:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 224. [2021-06-05 21:57:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.0448430493273544) internal successors, (679), 223 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 679 transitions. [2021-06-05 21:57:31,419 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 679 transitions. Word has length 17 [2021-06-05 21:57:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:31,419 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 679 transitions. [2021-06-05 21:57:31,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 679 transitions. [2021-06-05 21:57:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:31,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:31,420 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:31,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 21:57:31,420 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1897351786, now seen corresponding path program 17 times [2021-06-05 21:57:31,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:31,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023347334] [2021-06-05 21:57:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:31,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:31,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023347334] [2021-06-05 21:57:31,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023347334] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:31,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:31,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:31,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554323704] [2021-06-05 21:57:31,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:31,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:31,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:31,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:31,490 INFO L87 Difference]: Start difference. First operand 224 states and 679 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:31,730 INFO L93 Difference]: Finished difference Result 491 states and 1364 transitions. [2021-06-05 21:57:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:31,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:31,732 INFO L225 Difference]: With dead ends: 491 [2021-06-05 21:57:31,732 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 21:57:31,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 21:57:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 227. [2021-06-05 21:57:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 3.0707964601769913) internal successors, (694), 226 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 694 transitions. [2021-06-05 21:57:31,737 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 694 transitions. Word has length 17 [2021-06-05 21:57:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:31,737 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 694 transitions. [2021-06-05 21:57:31,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 694 transitions. [2021-06-05 21:57:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:31,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:31,738 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:31,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 21:57:31,738 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:31,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:31,739 INFO L82 PathProgramCache]: Analyzing trace with hash -773277742, now seen corresponding path program 18 times [2021-06-05 21:57:31,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:31,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211443150] [2021-06-05 21:57:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:31,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:31,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211443150] [2021-06-05 21:57:31,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211443150] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:31,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:31,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:57:31,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828686948] [2021-06-05 21:57:31,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:57:31,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:57:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:57:31,787 INFO L87 Difference]: Start difference. First operand 227 states and 694 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:31,887 INFO L93 Difference]: Finished difference Result 417 states and 1196 transitions. [2021-06-05 21:57:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:57:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:31,889 INFO L225 Difference]: With dead ends: 417 [2021-06-05 21:57:31,889 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 21:57:31,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 21:57:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 231. [2021-06-05 21:57:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.121739130434783) internal successors, (718), 230 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 718 transitions. [2021-06-05 21:57:31,894 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 718 transitions. Word has length 17 [2021-06-05 21:57:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:31,894 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 718 transitions. [2021-06-05 21:57:31,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 718 transitions. [2021-06-05 21:57:31,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:31,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:31,894 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:31,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 21:57:31,895 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:31,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:31,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1982261886, now seen corresponding path program 19 times [2021-06-05 21:57:31,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:31,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953878509] [2021-06-05 21:57:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:31,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:31,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953878509] [2021-06-05 21:57:31,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953878509] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:31,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:31,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:57:31,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389730342] [2021-06-05 21:57:31,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:57:31,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:31,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:57:31,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:57:31,937 INFO L87 Difference]: Start difference. First operand 231 states and 718 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:32,030 INFO L93 Difference]: Finished difference Result 372 states and 1090 transitions. [2021-06-05 21:57:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:57:32,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:32,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:32,032 INFO L225 Difference]: With dead ends: 372 [2021-06-05 21:57:32,032 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 21:57:32,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:57:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 21:57:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 237. [2021-06-05 21:57:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 3.114406779661017) internal successors, (735), 236 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 735 transitions. [2021-06-05 21:57:32,036 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 735 transitions. Word has length 17 [2021-06-05 21:57:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:32,037 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 735 transitions. [2021-06-05 21:57:32,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 735 transitions. [2021-06-05 21:57:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:32,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:32,037 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:32,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 21:57:32,038 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1814506960, now seen corresponding path program 20 times [2021-06-05 21:57:32,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:32,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487776955] [2021-06-05 21:57:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:32,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:32,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487776955] [2021-06-05 21:57:32,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487776955] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:32,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:32,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:32,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902643912] [2021-06-05 21:57:32,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:32,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:32,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:32,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:32,120 INFO L87 Difference]: Start difference. First operand 237 states and 735 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:32,358 INFO L93 Difference]: Finished difference Result 459 states and 1341 transitions. [2021-06-05 21:57:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:32,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:32,361 INFO L225 Difference]: With dead ends: 459 [2021-06-05 21:57:32,361 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 21:57:32,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 21:57:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 245. [2021-06-05 21:57:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.151639344262295) internal successors, (769), 244 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 769 transitions. [2021-06-05 21:57:32,366 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 769 transitions. Word has length 17 [2021-06-05 21:57:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:32,366 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 769 transitions. [2021-06-05 21:57:32,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 769 transitions. [2021-06-05 21:57:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:32,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:32,367 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:32,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 21:57:32,367 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:32,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1247554880, now seen corresponding path program 21 times [2021-06-05 21:57:32,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:32,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282837130] [2021-06-05 21:57:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:32,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:32,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282837130] [2021-06-05 21:57:32,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282837130] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:32,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:32,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521908088] [2021-06-05 21:57:32,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:32,444 INFO L87 Difference]: Start difference. First operand 245 states and 769 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:32,665 INFO L93 Difference]: Finished difference Result 459 states and 1328 transitions. [2021-06-05 21:57:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:32,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:32,670 INFO L225 Difference]: With dead ends: 459 [2021-06-05 21:57:32,670 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 21:57:32,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 21:57:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 242. [2021-06-05 21:57:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.132780082987552) internal successors, (755), 241 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 755 transitions. [2021-06-05 21:57:32,676 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 755 transitions. Word has length 17 [2021-06-05 21:57:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:32,676 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 755 transitions. [2021-06-05 21:57:32,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 755 transitions. [2021-06-05 21:57:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:32,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:32,678 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:32,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 21:57:32,678 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:32,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1819009686, now seen corresponding path program 22 times [2021-06-05 21:57:32,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:32,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527014180] [2021-06-05 21:57:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:32,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527014180] [2021-06-05 21:57:32,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527014180] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:32,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:32,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:32,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431572977] [2021-06-05 21:57:32,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:32,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:32,772 INFO L87 Difference]: Start difference. First operand 242 states and 755 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:32,973 INFO L93 Difference]: Finished difference Result 464 states and 1336 transitions. [2021-06-05 21:57:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:32,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:32,975 INFO L225 Difference]: With dead ends: 464 [2021-06-05 21:57:32,975 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 21:57:32,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 21:57:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 239. [2021-06-05 21:57:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 3.1260504201680672) internal successors, (744), 238 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 744 transitions. [2021-06-05 21:57:32,980 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 744 transitions. Word has length 17 [2021-06-05 21:57:32,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:32,980 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 744 transitions. [2021-06-05 21:57:32,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,980 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 744 transitions. [2021-06-05 21:57:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:32,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:32,981 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:32,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 21:57:32,981 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash -641213590, now seen corresponding path program 23 times [2021-06-05 21:57:32,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:32,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080513415] [2021-06-05 21:57:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:33,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:33,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080513415] [2021-06-05 21:57:33,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080513415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:33,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:33,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:33,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480424218] [2021-06-05 21:57:33,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:33,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:33,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:33,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:33,067 INFO L87 Difference]: Start difference. First operand 239 states and 744 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:33,348 INFO L93 Difference]: Finished difference Result 501 states and 1445 transitions. [2021-06-05 21:57:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:33,350 INFO L225 Difference]: With dead ends: 501 [2021-06-05 21:57:33,350 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 21:57:33,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 21:57:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 245. [2021-06-05 21:57:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.168032786885246) internal successors, (773), 244 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 773 transitions. [2021-06-05 21:57:33,356 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 773 transitions. Word has length 17 [2021-06-05 21:57:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:33,356 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 773 transitions. [2021-06-05 21:57:33,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 773 transitions. [2021-06-05 21:57:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:33,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:33,357 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:33,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 21:57:33,357 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash -74261510, now seen corresponding path program 24 times [2021-06-05 21:57:33,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:33,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987849051] [2021-06-05 21:57:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:33,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:33,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987849051] [2021-06-05 21:57:33,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987849051] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:33,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:33,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:33,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174983091] [2021-06-05 21:57:33,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:33,445 INFO L87 Difference]: Start difference. First operand 245 states and 773 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:33,741 INFO L93 Difference]: Finished difference Result 501 states and 1432 transitions. [2021-06-05 21:57:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:33,743 INFO L225 Difference]: With dead ends: 501 [2021-06-05 21:57:33,744 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 21:57:33,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 21:57:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 242. [2021-06-05 21:57:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.1493775933609958) internal successors, (759), 241 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 759 transitions. [2021-06-05 21:57:33,749 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 759 transitions. Word has length 17 [2021-06-05 21:57:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:33,749 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 759 transitions. [2021-06-05 21:57:33,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 759 transitions. [2021-06-05 21:57:33,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:33,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:33,750 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:33,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 21:57:33,750 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:33,751 INFO L82 PathProgramCache]: Analyzing trace with hash 651128810, now seen corresponding path program 25 times [2021-06-05 21:57:33,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:33,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968690500] [2021-06-05 21:57:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:33,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:33,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968690500] [2021-06-05 21:57:33,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968690500] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:33,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:33,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:33,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030846474] [2021-06-05 21:57:33,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:33,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:33,831 INFO L87 Difference]: Start difference. First operand 242 states and 759 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:34,014 INFO L93 Difference]: Finished difference Result 491 states and 1419 transitions. [2021-06-05 21:57:34,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:57:34,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:34,016 INFO L225 Difference]: With dead ends: 491 [2021-06-05 21:57:34,016 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 21:57:34,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 21:57:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 245. [2021-06-05 21:57:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.1639344262295084) internal successors, (772), 244 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 772 transitions. [2021-06-05 21:57:34,021 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 772 transitions. Word has length 17 [2021-06-05 21:57:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:34,021 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 772 transitions. [2021-06-05 21:57:34,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 772 transitions. [2021-06-05 21:57:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:34,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:34,022 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:34,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 21:57:34,022 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:34,022 INFO L82 PathProgramCache]: Analyzing trace with hash 275931370, now seen corresponding path program 26 times [2021-06-05 21:57:34,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:34,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084897344] [2021-06-05 21:57:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:34,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:34,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084897344] [2021-06-05 21:57:34,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084897344] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:34,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:34,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:34,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231685815] [2021-06-05 21:57:34,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:34,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:34,111 INFO L87 Difference]: Start difference. First operand 245 states and 772 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:34,366 INFO L93 Difference]: Finished difference Result 477 states and 1392 transitions. [2021-06-05 21:57:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:34,368 INFO L225 Difference]: With dead ends: 477 [2021-06-05 21:57:34,368 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 21:57:34,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 21:57:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 242. [2021-06-05 21:57:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.141078838174274) internal successors, (757), 241 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 757 transitions. [2021-06-05 21:57:34,373 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 757 transitions. Word has length 17 [2021-06-05 21:57:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:34,373 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 757 transitions. [2021-06-05 21:57:34,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 757 transitions. [2021-06-05 21:57:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:34,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:34,374 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:34,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 21:57:34,374 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash 447035002, now seen corresponding path program 27 times [2021-06-05 21:57:34,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:34,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808483473] [2021-06-05 21:57:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:34,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808483473] [2021-06-05 21:57:34,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808483473] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:34,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:34,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:34,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23584582] [2021-06-05 21:57:34,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:34,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:34,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:34,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:34,445 INFO L87 Difference]: Start difference. First operand 242 states and 757 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:34,650 INFO L93 Difference]: Finished difference Result 515 states and 1469 transitions. [2021-06-05 21:57:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:34,653 INFO L225 Difference]: With dead ends: 515 [2021-06-05 21:57:34,653 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 21:57:34,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 21:57:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 244. [2021-06-05 21:57:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.1358024691358026) internal successors, (762), 243 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 762 transitions. [2021-06-05 21:57:34,659 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 762 transitions. Word has length 17 [2021-06-05 21:57:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:34,659 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 762 transitions. [2021-06-05 21:57:34,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 762 transitions. [2021-06-05 21:57:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:34,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:34,659 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:34,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 21:57:34,659 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:34,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1316167168, now seen corresponding path program 28 times [2021-06-05 21:57:34,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:34,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326914435] [2021-06-05 21:57:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:34,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:34,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326914435] [2021-06-05 21:57:34,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326914435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:34,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:34,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:34,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62478609] [2021-06-05 21:57:34,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:34,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:34,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:34,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:34,767 INFO L87 Difference]: Start difference. First operand 244 states and 762 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:34,989 INFO L93 Difference]: Finished difference Result 486 states and 1417 transitions. [2021-06-05 21:57:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:34,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:34,991 INFO L225 Difference]: With dead ends: 486 [2021-06-05 21:57:34,991 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 21:57:34,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 21:57:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 244. [2021-06-05 21:57:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.1358024691358026) internal successors, (762), 243 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 762 transitions. [2021-06-05 21:57:34,995 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 762 transitions. Word has length 17 [2021-06-05 21:57:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:34,996 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 762 transitions. [2021-06-05 21:57:34,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 762 transitions. [2021-06-05 21:57:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:34,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:34,996 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:34,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 21:57:34,996 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1963810802, now seen corresponding path program 29 times [2021-06-05 21:57:34,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:34,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910243416] [2021-06-05 21:57:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:35,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:35,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910243416] [2021-06-05 21:57:35,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910243416] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:35,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:35,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:35,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7493266] [2021-06-05 21:57:35,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:35,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:35,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:35,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:35,063 INFO L87 Difference]: Start difference. First operand 244 states and 762 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:35,226 INFO L93 Difference]: Finished difference Result 476 states and 1397 transitions. [2021-06-05 21:57:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:35,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:35,228 INFO L225 Difference]: With dead ends: 476 [2021-06-05 21:57:35,228 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 21:57:35,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 21:57:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 250. [2021-06-05 21:57:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.1526104417670684) internal successors, (785), 249 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 785 transitions. [2021-06-05 21:57:35,235 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 785 transitions. Word has length 17 [2021-06-05 21:57:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:35,235 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 785 transitions. [2021-06-05 21:57:35,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 785 transitions. [2021-06-05 21:57:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:35,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:35,236 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:35,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 21:57:35,236 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -706818726, now seen corresponding path program 30 times [2021-06-05 21:57:35,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:35,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993367220] [2021-06-05 21:57:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:35,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993367220] [2021-06-05 21:57:35,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993367220] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:35,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:35,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:57:35,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602434495] [2021-06-05 21:57:35,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:57:35,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:35,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:57:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:57:35,295 INFO L87 Difference]: Start difference. First operand 250 states and 785 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:35,372 INFO L93 Difference]: Finished difference Result 445 states and 1315 transitions. [2021-06-05 21:57:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:57:35,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:35,374 INFO L225 Difference]: With dead ends: 445 [2021-06-05 21:57:35,374 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 21:57:35,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 21:57:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 259. [2021-06-05 21:57:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.197674418604651) internal successors, (825), 258 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 825 transitions. [2021-06-05 21:57:35,378 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 825 transitions. Word has length 17 [2021-06-05 21:57:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:35,378 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 825 transitions. [2021-06-05 21:57:35,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 825 transitions. [2021-06-05 21:57:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:35,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:35,379 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:35,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 21:57:35,379 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1915802870, now seen corresponding path program 31 times [2021-06-05 21:57:35,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:35,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177589716] [2021-06-05 21:57:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:35,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:35,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177589716] [2021-06-05 21:57:35,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177589716] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:35,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:35,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:57:35,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121837353] [2021-06-05 21:57:35,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:57:35,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:57:35,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:57:35,425 INFO L87 Difference]: Start difference. First operand 259 states and 825 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:35,492 INFO L93 Difference]: Finished difference Result 458 states and 1353 transitions. [2021-06-05 21:57:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:57:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:35,494 INFO L225 Difference]: With dead ends: 458 [2021-06-05 21:57:35,494 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 21:57:35,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 21:57:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 252. [2021-06-05 21:57:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-05 21:57:35,498 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-05 21:57:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:35,499 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-05 21:57:35,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-05 21:57:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:35,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:35,499 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:35,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-05 21:57:35,499 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:35,499 INFO L82 PathProgramCache]: Analyzing trace with hash 939630764, now seen corresponding path program 32 times [2021-06-05 21:57:35,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:35,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63489389] [2021-06-05 21:57:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:35,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:35,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63489389] [2021-06-05 21:57:35,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63489389] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:35,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:35,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:35,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473189730] [2021-06-05 21:57:35,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:35,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:35,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:35,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:35,559 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:35,735 INFO L93 Difference]: Finished difference Result 403 states and 1169 transitions. [2021-06-05 21:57:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:35,740 INFO L225 Difference]: With dead ends: 403 [2021-06-05 21:57:35,740 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 21:57:35,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 21:57:35,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 254. [2021-06-05 21:57:35,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.1343873517786562) internal successors, (793), 253 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 793 transitions. [2021-06-05 21:57:35,744 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 793 transitions. Word has length 17 [2021-06-05 21:57:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:35,744 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 793 transitions. [2021-06-05 21:57:35,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 793 transitions. [2021-06-05 21:57:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:35,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:35,745 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:35,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-05 21:57:35,745 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1808762930, now seen corresponding path program 33 times [2021-06-05 21:57:35,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:35,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647602248] [2021-06-05 21:57:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:35,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:35,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647602248] [2021-06-05 21:57:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647602248] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:35,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:35,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:35,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995786231] [2021-06-05 21:57:35,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:35,808 INFO L87 Difference]: Start difference. First operand 254 states and 793 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,022 INFO L93 Difference]: Finished difference Result 403 states and 1175 transitions. [2021-06-05 21:57:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:36,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,024 INFO L225 Difference]: With dead ends: 403 [2021-06-05 21:57:36,024 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 21:57:36,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 21:57:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 252. [2021-06-05 21:57:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-05 21:57:36,029 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-05 21:57:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:36,029 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-05 21:57:36,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-05 21:57:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:57:36,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:36,030 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:36,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-05 21:57:36,030 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash 421173314, now seen corresponding path program 34 times [2021-06-05 21:57:36,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:36,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804858678] [2021-06-05 21:57:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:36,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804858678] [2021-06-05 21:57:36,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804858678] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:36,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:36,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 21:57:36,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607220924] [2021-06-05 21:57:36,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:57:36,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:57:36,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:57:36,061 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,118 INFO L93 Difference]: Finished difference Result 380 states and 1126 transitions. [2021-06-05 21:57:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:57:36,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:57:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,120 INFO L225 Difference]: With dead ends: 380 [2021-06-05 21:57:36,120 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 21:57:36,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:57:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 21:57:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 252. [2021-06-05 21:57:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-05 21:57:36,124 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-05 21:57:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:36,124 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-05 21:57:36,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-05 21:57:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:36,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:36,125 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:36,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-05 21:57:36,125 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash -847314392, now seen corresponding path program 1 times [2021-06-05 21:57:36,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:36,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076730206] [2021-06-05 21:57:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:36,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076730206] [2021-06-05 21:57:36,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076730206] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:36,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:36,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994563392] [2021-06-05 21:57:36,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:36,163 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,263 INFO L93 Difference]: Finished difference Result 445 states and 1298 transitions. [2021-06-05 21:57:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:36,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,264 INFO L225 Difference]: With dead ends: 445 [2021-06-05 21:57:36,264 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 21:57:36,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 21:57:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 257. [2021-06-05 21:57:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.12890625) internal successors, (801), 256 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 801 transitions. [2021-06-05 21:57:36,269 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 801 transitions. Word has length 18 [2021-06-05 21:57:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:36,269 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 801 transitions. [2021-06-05 21:57:36,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 801 transitions. [2021-06-05 21:57:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:36,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:36,269 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:36,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-05 21:57:36,270 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:36,270 INFO L82 PathProgramCache]: Analyzing trace with hash -47426210, now seen corresponding path program 1 times [2021-06-05 21:57:36,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:36,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780650259] [2021-06-05 21:57:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780650259] [2021-06-05 21:57:36,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780650259] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:36,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:36,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 21:57:36,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045778386] [2021-06-05 21:57:36,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:57:36,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:57:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:57:36,316 INFO L87 Difference]: Start difference. First operand 257 states and 801 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,412 INFO L93 Difference]: Finished difference Result 496 states and 1436 transitions. [2021-06-05 21:57:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,414 INFO L225 Difference]: With dead ends: 496 [2021-06-05 21:57:36,414 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 21:57:36,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 21:57:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 257. [2021-06-05 21:57:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.12890625) internal successors, (801), 256 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 801 transitions. [2021-06-05 21:57:36,423 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 801 transitions. Word has length 18 [2021-06-05 21:57:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:36,423 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 801 transitions. [2021-06-05 21:57:36,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 801 transitions. [2021-06-05 21:57:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:36,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:36,424 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:36,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-05 21:57:36,424 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1111217320, now seen corresponding path program 2 times [2021-06-05 21:57:36,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:36,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416511722] [2021-06-05 21:57:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:36,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416511722] [2021-06-05 21:57:36,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416511722] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:36,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:36,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:36,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638311051] [2021-06-05 21:57:36,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:36,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:36,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:36,461 INFO L87 Difference]: Start difference. First operand 257 states and 801 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,558 INFO L93 Difference]: Finished difference Result 505 states and 1450 transitions. [2021-06-05 21:57:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:36,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,560 INFO L225 Difference]: With dead ends: 505 [2021-06-05 21:57:36,560 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 21:57:36,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 21:57:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-06-05 21:57:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.135135135135135) internal successors, (812), 259 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 812 transitions. [2021-06-05 21:57:36,564 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 812 transitions. Word has length 18 [2021-06-05 21:57:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:36,564 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 812 transitions. [2021-06-05 21:57:36,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 812 transitions. [2021-06-05 21:57:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:36,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:36,565 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:36,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-05 21:57:36,565 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash -382690402, now seen corresponding path program 3 times [2021-06-05 21:57:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:36,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542243634] [2021-06-05 21:57:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542243634] [2021-06-05 21:57:36,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542243634] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:36,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:36,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:36,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657828877] [2021-06-05 21:57:36,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:36,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:36,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:36,594 INFO L87 Difference]: Start difference. First operand 260 states and 812 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,687 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-06-05 21:57:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:36,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,689 INFO L225 Difference]: With dead ends: 462 [2021-06-05 21:57:36,689 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 21:57:36,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 21:57:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 260. [2021-06-05 21:57:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.1235521235521237) internal successors, (809), 259 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 809 transitions. [2021-06-05 21:57:36,693 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 809 transitions. Word has length 18 [2021-06-05 21:57:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:36,693 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 809 transitions. [2021-06-05 21:57:36,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 809 transitions. [2021-06-05 21:57:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:36,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:36,694 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:36,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-05 21:57:36,694 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:36,694 INFO L82 PathProgramCache]: Analyzing trace with hash -995566800, now seen corresponding path program 4 times [2021-06-05 21:57:36,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:36,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724695661] [2021-06-05 21:57:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:36,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724695661] [2021-06-05 21:57:36,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724695661] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:36,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:36,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:36,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160770359] [2021-06-05 21:57:36,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:36,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:36,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:36,728 INFO L87 Difference]: Start difference. First operand 260 states and 809 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,827 INFO L93 Difference]: Finished difference Result 481 states and 1389 transitions. [2021-06-05 21:57:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,828 INFO L225 Difference]: With dead ends: 481 [2021-06-05 21:57:36,829 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 21:57:36,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 21:57:36,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 266. [2021-06-05 21:57:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.1358490566037736) internal successors, (831), 265 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 831 transitions. [2021-06-05 21:57:36,839 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 831 transitions. Word has length 18 [2021-06-05 21:57:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:36,840 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 831 transitions. [2021-06-05 21:57:36,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 831 transitions. [2021-06-05 21:57:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:36,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:36,840 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:36,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-05 21:57:36,840 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1805492774, now seen corresponding path program 5 times [2021-06-05 21:57:36,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:36,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768045801] [2021-06-05 21:57:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:36,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768045801] [2021-06-05 21:57:36,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768045801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:36,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:36,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:36,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481462032] [2021-06-05 21:57:36,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:36,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:36,874 INFO L87 Difference]: Start difference. First operand 266 states and 831 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,995 INFO L93 Difference]: Finished difference Result 487 states and 1396 transitions. [2021-06-05 21:57:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,996 INFO L225 Difference]: With dead ends: 487 [2021-06-05 21:57:36,996 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 21:57:36,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 21:57:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 263. [2021-06-05 21:57:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.1297709923664123) internal successors, (820), 262 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 820 transitions. [2021-06-05 21:57:37,000 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 820 transitions. Word has length 18 [2021-06-05 21:57:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:37,001 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 820 transitions. [2021-06-05 21:57:37,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 820 transitions. [2021-06-05 21:57:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:37,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:37,001 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:37,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-05 21:57:37,001 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:37,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1270262972, now seen corresponding path program 6 times [2021-06-05 21:57:37,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:37,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76909195] [2021-06-05 21:57:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:37,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76909195] [2021-06-05 21:57:37,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76909195] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:37,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:37,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:37,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877112123] [2021-06-05 21:57:37,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:37,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:37,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:37,038 INFO L87 Difference]: Start difference. First operand 263 states and 820 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:37,130 INFO L93 Difference]: Finished difference Result 445 states and 1301 transitions. [2021-06-05 21:57:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:37,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:37,131 INFO L225 Difference]: With dead ends: 445 [2021-06-05 21:57:37,131 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 21:57:37,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 21:57:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 263. [2021-06-05 21:57:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.118320610687023) internal successors, (817), 262 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 817 transitions. [2021-06-05 21:57:37,136 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 817 transitions. Word has length 18 [2021-06-05 21:57:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:37,136 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 817 transitions. [2021-06-05 21:57:37,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 817 transitions. [2021-06-05 21:57:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:37,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:37,136 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:37,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 21:57:37,136 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1406182626, now seen corresponding path program 2 times [2021-06-05 21:57:37,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:37,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505374756] [2021-06-05 21:57:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505374756] [2021-06-05 21:57:37,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505374756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:37,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:37,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:37,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068605580] [2021-06-05 21:57:37,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:37,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:37,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:37,183 INFO L87 Difference]: Start difference. First operand 263 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:37,341 INFO L93 Difference]: Finished difference Result 571 states and 1616 transitions. [2021-06-05 21:57:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:37,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:37,342 INFO L225 Difference]: With dead ends: 571 [2021-06-05 21:57:37,342 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 21:57:37,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 21:57:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 268. [2021-06-05 21:57:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.108614232209738) internal successors, (830), 267 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 830 transitions. [2021-06-05 21:57:37,347 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 830 transitions. Word has length 18 [2021-06-05 21:57:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:37,347 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 830 transitions. [2021-06-05 21:57:37,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 830 transitions. [2021-06-05 21:57:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:37,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:37,348 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:37,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-05 21:57:37,348 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1870302100, now seen corresponding path program 3 times [2021-06-05 21:57:37,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:37,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482380276] [2021-06-05 21:57:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:37,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482380276] [2021-06-05 21:57:37,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482380276] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:37,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:37,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:37,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135517510] [2021-06-05 21:57:37,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:37,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:37,391 INFO L87 Difference]: Start difference. First operand 268 states and 830 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:37,524 INFO L93 Difference]: Finished difference Result 596 states and 1673 transitions. [2021-06-05 21:57:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:37,525 INFO L225 Difference]: With dead ends: 596 [2021-06-05 21:57:37,525 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 21:57:37,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 21:57:37,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 281. [2021-06-05 21:57:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0964285714285715) internal successors, (867), 280 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 867 transitions. [2021-06-05 21:57:37,531 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 867 transitions. Word has length 18 [2021-06-05 21:57:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:37,531 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 867 transitions. [2021-06-05 21:57:37,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 867 transitions. [2021-06-05 21:57:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:37,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:37,532 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:37,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-05 21:57:37,532 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash 429863782, now seen corresponding path program 4 times [2021-06-05 21:57:37,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:37,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897639886] [2021-06-05 21:57:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:37,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897639886] [2021-06-05 21:57:37,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897639886] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:37,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:37,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:37,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833424343] [2021-06-05 21:57:37,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:37,575 INFO L87 Difference]: Start difference. First operand 281 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:37,704 INFO L93 Difference]: Finished difference Result 565 states and 1612 transitions. [2021-06-05 21:57:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:37,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:37,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:37,706 INFO L225 Difference]: With dead ends: 565 [2021-06-05 21:57:37,706 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 21:57:37,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 21:57:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 263. [2021-06-05 21:57:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.118320610687023) internal successors, (817), 262 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 817 transitions. [2021-06-05 21:57:37,711 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 817 transitions. Word has length 18 [2021-06-05 21:57:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:37,711 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 817 transitions. [2021-06-05 21:57:37,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 817 transitions. [2021-06-05 21:57:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:37,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:37,711 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:37,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-05 21:57:37,711 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:37,712 INFO L82 PathProgramCache]: Analyzing trace with hash -973318070, now seen corresponding path program 5 times [2021-06-05 21:57:37,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:37,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556706955] [2021-06-05 21:57:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:37,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556706955] [2021-06-05 21:57:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556706955] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:37,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:37,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016326447] [2021-06-05 21:57:37,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:37,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:37,755 INFO L87 Difference]: Start difference. First operand 263 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:37,877 INFO L93 Difference]: Finished difference Result 503 states and 1444 transitions. [2021-06-05 21:57:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:37,878 INFO L225 Difference]: With dead ends: 503 [2021-06-05 21:57:37,878 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 21:57:37,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 21:57:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 267. [2021-06-05 21:57:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1090225563909772) internal successors, (827), 266 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 827 transitions. [2021-06-05 21:57:37,882 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 827 transitions. Word has length 18 [2021-06-05 21:57:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:37,882 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 827 transitions. [2021-06-05 21:57:37,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 827 transitions. [2021-06-05 21:57:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:37,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:37,883 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:37,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-05 21:57:37,883 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:37,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:37,883 INFO L82 PathProgramCache]: Analyzing trace with hash 491168226, now seen corresponding path program 6 times [2021-06-05 21:57:37,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:37,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851657844] [2021-06-05 21:57:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:37,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851657844] [2021-06-05 21:57:37,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851657844] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:37,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:37,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:37,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901284566] [2021-06-05 21:57:37,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:37,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:37,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:37,921 INFO L87 Difference]: Start difference. First operand 267 states and 827 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:38,004 INFO L93 Difference]: Finished difference Result 493 states and 1423 transitions. [2021-06-05 21:57:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:38,005 INFO L225 Difference]: With dead ends: 493 [2021-06-05 21:57:38,005 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 21:57:38,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 21:57:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 278. [2021-06-05 21:57:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0902527075812274) internal successors, (856), 277 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 856 transitions. [2021-06-05 21:57:38,017 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 856 transitions. Word has length 18 [2021-06-05 21:57:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:38,017 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 856 transitions. [2021-06-05 21:57:38,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 856 transitions. [2021-06-05 21:57:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:38,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:38,018 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:38,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 21:57:38,018 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash -275677922, now seen corresponding path program 7 times [2021-06-05 21:57:38,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:38,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180283804] [2021-06-05 21:57:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:38,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180283804] [2021-06-05 21:57:38,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180283804] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:38,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:38,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:38,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098220179] [2021-06-05 21:57:38,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:38,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:38,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:38,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:38,061 INFO L87 Difference]: Start difference. First operand 278 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:38,153 INFO L93 Difference]: Finished difference Result 462 states and 1366 transitions. [2021-06-05 21:57:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:38,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:38,154 INFO L225 Difference]: With dead ends: 462 [2021-06-05 21:57:38,155 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 21:57:38,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 21:57:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-06-05 21:57:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1090225563909772) internal successors, (827), 266 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 827 transitions. [2021-06-05 21:57:38,159 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 827 transitions. Word has length 18 [2021-06-05 21:57:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:38,159 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 827 transitions. [2021-06-05 21:57:38,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 827 transitions. [2021-06-05 21:57:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:38,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:38,159 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:38,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-05 21:57:38,160 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:38,160 INFO L82 PathProgramCache]: Analyzing trace with hash -799867102, now seen corresponding path program 8 times [2021-06-05 21:57:38,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:38,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796792209] [2021-06-05 21:57:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:38,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796792209] [2021-06-05 21:57:38,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796792209] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:38,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:38,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:38,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390297028] [2021-06-05 21:57:38,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:38,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:38,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:38,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:38,198 INFO L87 Difference]: Start difference. First operand 267 states and 827 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:38,345 INFO L93 Difference]: Finished difference Result 562 states and 1608 transitions. [2021-06-05 21:57:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:38,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:38,346 INFO L225 Difference]: With dead ends: 562 [2021-06-05 21:57:38,346 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 21:57:38,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 21:57:38,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 282. [2021-06-05 21:57:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.117437722419929) internal successors, (876), 281 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 876 transitions. [2021-06-05 21:57:38,351 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 876 transitions. Word has length 18 [2021-06-05 21:57:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:38,351 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 876 transitions. [2021-06-05 21:57:38,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 876 transitions. [2021-06-05 21:57:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:38,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:38,351 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:38,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-05 21:57:38,352 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:38,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2054661876, now seen corresponding path program 9 times [2021-06-05 21:57:38,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:38,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584665570] [2021-06-05 21:57:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:38,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584665570] [2021-06-05 21:57:38,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584665570] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:38,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:38,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:38,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585689349] [2021-06-05 21:57:38,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:38,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:38,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:38,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:38,393 INFO L87 Difference]: Start difference. First operand 282 states and 876 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:38,522 INFO L93 Difference]: Finished difference Result 571 states and 1643 transitions. [2021-06-05 21:57:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:38,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:38,523 INFO L225 Difference]: With dead ends: 571 [2021-06-05 21:57:38,523 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 21:57:38,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 21:57:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 279. [2021-06-05 21:57:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.1223021582733814) internal successors, (868), 278 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 868 transitions. [2021-06-05 21:57:38,528 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 868 transitions. Word has length 18 [2021-06-05 21:57:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:38,528 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 868 transitions. [2021-06-05 21:57:38,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 868 transitions. [2021-06-05 21:57:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:38,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:38,529 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:38,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-05 21:57:38,529 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1985003846, now seen corresponding path program 10 times [2021-06-05 21:57:38,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:38,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466232639] [2021-06-05 21:57:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:38,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466232639] [2021-06-05 21:57:38,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466232639] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:38,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:38,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:38,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95764622] [2021-06-05 21:57:38,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:38,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:38,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:38,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:38,573 INFO L87 Difference]: Start difference. First operand 279 states and 868 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:38,685 INFO L93 Difference]: Finished difference Result 552 states and 1575 transitions. [2021-06-05 21:57:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:38,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:38,686 INFO L225 Difference]: With dead ends: 552 [2021-06-05 21:57:38,686 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 21:57:38,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 21:57:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 283. [2021-06-05 21:57:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.127659574468085) internal successors, (882), 282 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 882 transitions. [2021-06-05 21:57:38,691 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 882 transitions. Word has length 18 [2021-06-05 21:57:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:38,691 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 882 transitions. [2021-06-05 21:57:38,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 882 transitions. [2021-06-05 21:57:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:38,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:38,691 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:38,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-05 21:57:38,691 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:38,692 INFO L82 PathProgramCache]: Analyzing trace with hash 382898978, now seen corresponding path program 11 times [2021-06-05 21:57:38,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:38,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639775126] [2021-06-05 21:57:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:38,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639775126] [2021-06-05 21:57:38,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639775126] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:38,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:38,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:38,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653641] [2021-06-05 21:57:38,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:38,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:38,737 INFO L87 Difference]: Start difference. First operand 283 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:38,826 INFO L93 Difference]: Finished difference Result 527 states and 1539 transitions. [2021-06-05 21:57:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:38,828 INFO L225 Difference]: With dead ends: 527 [2021-06-05 21:57:38,828 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 21:57:38,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 21:57:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 281. [2021-06-05 21:57:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.132142857142857) internal successors, (877), 280 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 877 transitions. [2021-06-05 21:57:38,833 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 877 transitions. Word has length 18 [2021-06-05 21:57:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:38,833 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 877 transitions. [2021-06-05 21:57:38,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 877 transitions. [2021-06-05 21:57:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:38,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:38,834 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:38,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-05 21:57:38,834 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1962276450, now seen corresponding path program 12 times [2021-06-05 21:57:38,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:38,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150381199] [2021-06-05 21:57:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:38,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150381199] [2021-06-05 21:57:38,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150381199] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:38,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:38,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:38,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181352350] [2021-06-05 21:57:38,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:38,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:38,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:38,891 INFO L87 Difference]: Start difference. First operand 281 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:38,995 INFO L93 Difference]: Finished difference Result 528 states and 1534 transitions. [2021-06-05 21:57:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:38,997 INFO L225 Difference]: With dead ends: 528 [2021-06-05 21:57:38,997 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 21:57:38,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 21:57:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 278. [2021-06-05 21:57:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.115523465703971) internal successors, (863), 277 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 863 transitions. [2021-06-05 21:57:39,002 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 863 transitions. Word has length 18 [2021-06-05 21:57:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:39,002 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 863 transitions. [2021-06-05 21:57:39,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 863 transitions. [2021-06-05 21:57:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:39,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:39,002 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:39,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-05 21:57:39,003 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:39,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:39,003 INFO L82 PathProgramCache]: Analyzing trace with hash -708353078, now seen corresponding path program 13 times [2021-06-05 21:57:39,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:39,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911548640] [2021-06-05 21:57:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:39,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911548640] [2021-06-05 21:57:39,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911548640] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:39,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:39,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:39,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192233150] [2021-06-05 21:57:39,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:39,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:39,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:39,045 INFO L87 Difference]: Start difference. First operand 278 states and 863 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:39,136 INFO L93 Difference]: Finished difference Result 492 states and 1454 transitions. [2021-06-05 21:57:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:39,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:39,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:39,138 INFO L225 Difference]: With dead ends: 492 [2021-06-05 21:57:39,138 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 21:57:39,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 21:57:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 268. [2021-06-05 21:57:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.1198501872659175) internal successors, (833), 267 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 833 transitions. [2021-06-05 21:57:39,141 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 833 transitions. Word has length 18 [2021-06-05 21:57:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:39,142 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 833 transitions. [2021-06-05 21:57:39,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 833 transitions. [2021-06-05 21:57:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:39,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:39,142 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:39,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-05 21:57:39,142 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash 634121620, now seen corresponding path program 14 times [2021-06-05 21:57:39,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:39,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323789121] [2021-06-05 21:57:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:39,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323789121] [2021-06-05 21:57:39,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323789121] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:39,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:39,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:39,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20778319] [2021-06-05 21:57:39,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:39,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:39,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:39,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:39,179 INFO L87 Difference]: Start difference. First operand 268 states and 833 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:39,294 INFO L93 Difference]: Finished difference Result 569 states and 1632 transitions. [2021-06-05 21:57:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:39,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:39,306 INFO L225 Difference]: With dead ends: 569 [2021-06-05 21:57:39,306 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 21:57:39,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 21:57:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 287. [2021-06-05 21:57:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1083916083916083) internal successors, (889), 286 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 889 transitions. [2021-06-05 21:57:39,310 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 889 transitions. Word has length 18 [2021-06-05 21:57:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:39,310 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 889 transitions. [2021-06-05 21:57:39,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 889 transitions. [2021-06-05 21:57:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:39,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:39,311 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:39,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-05 21:57:39,311 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:39,311 INFO L82 PathProgramCache]: Analyzing trace with hash -806316698, now seen corresponding path program 15 times [2021-06-05 21:57:39,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:39,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490429244] [2021-06-05 21:57:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:39,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490429244] [2021-06-05 21:57:39,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490429244] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:39,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:39,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:39,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809159625] [2021-06-05 21:57:39,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:39,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:39,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:39,349 INFO L87 Difference]: Start difference. First operand 287 states and 889 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:39,484 INFO L93 Difference]: Finished difference Result 571 states and 1645 transitions. [2021-06-05 21:57:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:39,485 INFO L225 Difference]: With dead ends: 571 [2021-06-05 21:57:39,485 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 21:57:39,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 21:57:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 284. [2021-06-05 21:57:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.1130742049469964) internal successors, (881), 283 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 881 transitions. [2021-06-05 21:57:39,490 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 881 transitions. Word has length 18 [2021-06-05 21:57:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:39,490 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 881 transitions. [2021-06-05 21:57:39,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 881 transitions. [2021-06-05 21:57:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:39,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:39,491 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:39,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-05 21:57:39,491 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:39,491 INFO L82 PathProgramCache]: Analyzing trace with hash 269394458, now seen corresponding path program 16 times [2021-06-05 21:57:39,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:39,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778399365] [2021-06-05 21:57:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778399365] [2021-06-05 21:57:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778399365] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:39,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:39,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:39,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409098869] [2021-06-05 21:57:39,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:39,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:39,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:39,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:39,521 INFO L87 Difference]: Start difference. First operand 284 states and 881 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:39,620 INFO L93 Difference]: Finished difference Result 605 states and 1745 transitions. [2021-06-05 21:57:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:39,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:39,621 INFO L225 Difference]: With dead ends: 605 [2021-06-05 21:57:39,621 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 21:57:39,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 21:57:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 281. [2021-06-05 21:57:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.117857142857143) internal successors, (873), 280 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 873 transitions. [2021-06-05 21:57:39,626 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 873 transitions. Word has length 18 [2021-06-05 21:57:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:39,626 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 873 transitions. [2021-06-05 21:57:39,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 873 transitions. [2021-06-05 21:57:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:39,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:39,627 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:39,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-05 21:57:39,627 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash -154077336, now seen corresponding path program 7 times [2021-06-05 21:57:39,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:39,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955614885] [2021-06-05 21:57:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:39,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955614885] [2021-06-05 21:57:39,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955614885] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:39,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:39,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:39,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031273846] [2021-06-05 21:57:39,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:39,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:39,670 INFO L87 Difference]: Start difference. First operand 281 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:39,794 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-06-05 21:57:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:39,795 INFO L225 Difference]: With dead ends: 576 [2021-06-05 21:57:39,795 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 21:57:39,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 21:57:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 288. [2021-06-05 21:57:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.1498257839721253) internal successors, (904), 287 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 904 transitions. [2021-06-05 21:57:39,800 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 904 transitions. Word has length 18 [2021-06-05 21:57:39,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:39,800 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 904 transitions. [2021-06-05 21:57:39,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 904 transitions. [2021-06-05 21:57:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:39,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:39,801 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:39,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-05 21:57:39,801 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1647985058, now seen corresponding path program 8 times [2021-06-05 21:57:39,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:39,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228748479] [2021-06-05 21:57:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:39,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228748479] [2021-06-05 21:57:39,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228748479] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:39,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:39,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:39,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061835212] [2021-06-05 21:57:39,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:39,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:39,842 INFO L87 Difference]: Start difference. First operand 288 states and 904 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:39,995 INFO L93 Difference]: Finished difference Result 582 states and 1678 transitions. [2021-06-05 21:57:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:39,996 INFO L225 Difference]: With dead ends: 582 [2021-06-05 21:57:39,996 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 21:57:39,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 21:57:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 291. [2021-06-05 21:57:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1241379310344826) internal successors, (906), 290 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 906 transitions. [2021-06-05 21:57:40,001 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 906 transitions. Word has length 18 [2021-06-05 21:57:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:40,001 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 906 transitions. [2021-06-05 21:57:40,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 906 transitions. [2021-06-05 21:57:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:40,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:40,002 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:40,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-05 21:57:40,002 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:40,002 INFO L82 PathProgramCache]: Analyzing trace with hash 597323102, now seen corresponding path program 9 times [2021-06-05 21:57:40,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:40,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517004795] [2021-06-05 21:57:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:40,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:40,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517004795] [2021-06-05 21:57:40,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517004795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:40,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587943518] [2021-06-05 21:57:40,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:40,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:57:40,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:40,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:40,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:40,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587943518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:40,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:40,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:57:40,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216201822] [2021-06-05 21:57:40,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:57:40,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:40,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:57:40,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:40,317 INFO L87 Difference]: Start difference. First operand 291 states and 906 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:40,625 INFO L93 Difference]: Finished difference Result 573 states and 1656 transitions. [2021-06-05 21:57:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:40,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:40,626 INFO L225 Difference]: With dead ends: 573 [2021-06-05 21:57:40,626 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 21:57:40,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 21:57:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 284. [2021-06-05 21:57:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.137809187279152) internal successors, (888), 283 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 888 transitions. [2021-06-05 21:57:40,635 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 888 transitions. Word has length 18 [2021-06-05 21:57:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:40,635 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 888 transitions. [2021-06-05 21:57:40,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 888 transitions. [2021-06-05 21:57:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:40,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:40,637 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:40,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 21:57:40,853 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1889665502, now seen corresponding path program 10 times [2021-06-05 21:57:40,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:40,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079008859] [2021-06-05 21:57:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:40,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079008859] [2021-06-05 21:57:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079008859] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:40,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:40,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:40,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128576872] [2021-06-05 21:57:40,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:40,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:40,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:40,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:40,899 INFO L87 Difference]: Start difference. First operand 284 states and 888 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:40,993 INFO L93 Difference]: Finished difference Result 536 states and 1574 transitions. [2021-06-05 21:57:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:40,994 INFO L225 Difference]: With dead ends: 536 [2021-06-05 21:57:40,994 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 21:57:40,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 21:57:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 281. [2021-06-05 21:57:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.117857142857143) internal successors, (873), 280 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 873 transitions. [2021-06-05 21:57:40,999 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 873 transitions. Word has length 18 [2021-06-05 21:57:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:40,999 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 873 transitions. [2021-06-05 21:57:40,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 873 transitions. [2021-06-05 21:57:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:40,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:40,999 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:40,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-05 21:57:40,999 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,000 INFO L82 PathProgramCache]: Analyzing trace with hash 618059630, now seen corresponding path program 11 times [2021-06-05 21:57:41,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526677663] [2021-06-05 21:57:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:41,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526677663] [2021-06-05 21:57:41,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526677663] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:41,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:41,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:41,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582280077] [2021-06-05 21:57:41,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:41,042 INFO L87 Difference]: Start difference. First operand 281 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:41,167 INFO L93 Difference]: Finished difference Result 573 states and 1648 transitions. [2021-06-05 21:57:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:41,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:41,169 INFO L225 Difference]: With dead ends: 573 [2021-06-05 21:57:41,169 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 21:57:41,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 21:57:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 291. [2021-06-05 21:57:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.103448275862069) internal successors, (900), 290 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 900 transitions. [2021-06-05 21:57:41,174 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 900 transitions. Word has length 18 [2021-06-05 21:57:41,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:41,174 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 900 transitions. [2021-06-05 21:57:41,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,174 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 900 transitions. [2021-06-05 21:57:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:41,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:41,174 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:41,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-05 21:57:41,175 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1297364296, now seen corresponding path program 12 times [2021-06-05 21:57:41,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329148076] [2021-06-05 21:57:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:41,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329148076] [2021-06-05 21:57:41,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329148076] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:41,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:41,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956989352] [2021-06-05 21:57:41,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:41,214 INFO L87 Difference]: Start difference. First operand 291 states and 900 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:41,303 INFO L93 Difference]: Finished difference Result 550 states and 1609 transitions. [2021-06-05 21:57:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:41,305 INFO L225 Difference]: With dead ends: 550 [2021-06-05 21:57:41,305 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 21:57:41,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 21:57:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 280. [2021-06-05 21:57:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.10752688172043) internal successors, (867), 279 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-06-05 21:57:41,310 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-06-05 21:57:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:41,311 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-06-05 21:57:41,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-06-05 21:57:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:41,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:41,311 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:41,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-05 21:57:41,312 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1494369000, now seen corresponding path program 13 times [2021-06-05 21:57:41,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517529838] [2021-06-05 21:57:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:41,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517529838] [2021-06-05 21:57:41,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517529838] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:41,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:41,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:41,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382727143] [2021-06-05 21:57:41,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:41,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:41,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:41,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:41,352 INFO L87 Difference]: Start difference. First operand 280 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:41,451 INFO L93 Difference]: Finished difference Result 511 states and 1487 transitions. [2021-06-05 21:57:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:41,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:41,453 INFO L225 Difference]: With dead ends: 511 [2021-06-05 21:57:41,453 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 21:57:41,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 21:57:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 290. [2021-06-05 21:57:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.093425605536332) internal successors, (894), 289 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 894 transitions. [2021-06-05 21:57:41,457 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 894 transitions. Word has length 18 [2021-06-05 21:57:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:41,458 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 894 transitions. [2021-06-05 21:57:41,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 894 transitions. [2021-06-05 21:57:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:41,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:41,458 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:41,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-05 21:57:41,459 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash 885174370, now seen corresponding path program 14 times [2021-06-05 21:57:41,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503333062] [2021-06-05 21:57:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:41,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503333062] [2021-06-05 21:57:41,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503333062] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:41,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:41,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:41,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419764254] [2021-06-05 21:57:41,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:41,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:41,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:41,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:41,500 INFO L87 Difference]: Start difference. First operand 290 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:41,594 INFO L93 Difference]: Finished difference Result 482 states and 1433 transitions. [2021-06-05 21:57:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:41,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:41,595 INFO L225 Difference]: With dead ends: 482 [2021-06-05 21:57:41,595 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 21:57:41,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 21:57:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 278. [2021-06-05 21:57:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.111913357400722) internal successors, (862), 277 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 862 transitions. [2021-06-05 21:57:41,601 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 862 transitions. Word has length 18 [2021-06-05 21:57:41,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:41,601 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 862 transitions. [2021-06-05 21:57:41,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,601 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 862 transitions. [2021-06-05 21:57:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:41,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:41,602 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:41,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-05 21:57:41,602 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1700413548, now seen corresponding path program 17 times [2021-06-05 21:57:41,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942825307] [2021-06-05 21:57:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:41,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942825307] [2021-06-05 21:57:41,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942825307] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:41,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:41,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:41,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101565099] [2021-06-05 21:57:41,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:41,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:41,642 INFO L87 Difference]: Start difference. First operand 278 states and 862 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:41,753 INFO L93 Difference]: Finished difference Result 591 states and 1712 transitions. [2021-06-05 21:57:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:41,755 INFO L225 Difference]: With dead ends: 591 [2021-06-05 21:57:41,755 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 21:57:41,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 21:57:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 265. [2021-06-05 21:57:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.1136363636363638) internal successors, (822), 264 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 822 transitions. [2021-06-05 21:57:41,760 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 822 transitions. Word has length 18 [2021-06-05 21:57:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:41,760 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 822 transitions. [2021-06-05 21:57:41,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 822 transitions. [2021-06-05 21:57:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:41,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:41,760 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:41,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-05 21:57:41,761 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash 920966376, now seen corresponding path program 18 times [2021-06-05 21:57:41,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365545952] [2021-06-05 21:57:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:41,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365545952] [2021-06-05 21:57:41,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365545952] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:41,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:41,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:41,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78747474] [2021-06-05 21:57:41,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:41,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:41,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:41,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:41,812 INFO L87 Difference]: Start difference. First operand 265 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:41,935 INFO L93 Difference]: Finished difference Result 471 states and 1344 transitions. [2021-06-05 21:57:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:41,936 INFO L225 Difference]: With dead ends: 471 [2021-06-05 21:57:41,936 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 21:57:41,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 21:57:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 265. [2021-06-05 21:57:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0946969696969697) internal successors, (817), 264 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 817 transitions. [2021-06-05 21:57:41,941 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 817 transitions. Word has length 18 [2021-06-05 21:57:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:41,941 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 817 transitions. [2021-06-05 21:57:41,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 817 transitions. [2021-06-05 21:57:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:41,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:41,942 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:41,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-05 21:57:41,942 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1720854558, now seen corresponding path program 15 times [2021-06-05 21:57:41,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675941443] [2021-06-05 21:57:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:42,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675941443] [2021-06-05 21:57:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675941443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719454463] [2021-06-05 21:57:42,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:42,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:57:42,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:42,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:42,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:42,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719454463] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:42,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:42,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2021-06-05 21:57:42,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751038996] [2021-06-05 21:57:42,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:42,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:42,115 INFO L87 Difference]: Start difference. First operand 265 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:42,241 INFO L93 Difference]: Finished difference Result 427 states and 1257 transitions. [2021-06-05 21:57:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:42,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:42,242 INFO L225 Difference]: With dead ends: 427 [2021-06-05 21:57:42,242 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 21:57:42,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:57:42,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 21:57:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 272. [2021-06-05 21:57:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.1180811808118083) internal successors, (845), 271 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 845 transitions. [2021-06-05 21:57:42,246 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 845 transitions. Word has length 18 [2021-06-05 21:57:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:42,246 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 845 transitions. [2021-06-05 21:57:42,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 845 transitions. [2021-06-05 21:57:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:42,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:42,247 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:42,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:57:42,454 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:42,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1415469208, now seen corresponding path program 16 times [2021-06-05 21:57:42,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:42,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208511119] [2021-06-05 21:57:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:42,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:42,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208511119] [2021-06-05 21:57:42,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208511119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:42,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546103103] [2021-06-05 21:57:42,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:42,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:42,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:42,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:42,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546103103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:42,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:42,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:57:42,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585869307] [2021-06-05 21:57:42,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:42,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:42,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:42,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:42,606 INFO L87 Difference]: Start difference. First operand 272 states and 845 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:42,761 INFO L93 Difference]: Finished difference Result 468 states and 1355 transitions. [2021-06-05 21:57:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:42,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:42,762 INFO L225 Difference]: With dead ends: 468 [2021-06-05 21:57:42,762 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 21:57:42,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:57:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 21:57:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 278. [2021-06-05 21:57:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.1407942238267146) internal successors, (870), 277 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 870 transitions. [2021-06-05 21:57:42,767 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 870 transitions. Word has length 18 [2021-06-05 21:57:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:42,767 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 870 transitions. [2021-06-05 21:57:42,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 870 transitions. [2021-06-05 21:57:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:42,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:42,768 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:42,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:42,983 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1385590366, now seen corresponding path program 17 times [2021-06-05 21:57:42,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:42,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249085449] [2021-06-05 21:57:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:43,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249085449] [2021-06-05 21:57:43,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249085449] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:43,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:43,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:43,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962229584] [2021-06-05 21:57:43,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:43,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:43,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:43,027 INFO L87 Difference]: Start difference. First operand 278 states and 870 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:43,138 INFO L93 Difference]: Finished difference Result 400 states and 1209 transitions. [2021-06-05 21:57:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:57:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:43,139 INFO L225 Difference]: With dead ends: 400 [2021-06-05 21:57:43,140 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 21:57:43,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:43,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 21:57:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 270. [2021-06-05 21:57:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-05 21:57:43,150 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-05 21:57:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:43,150 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-05 21:57:43,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-05 21:57:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:43,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:43,150 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:43,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-06-05 21:57:43,150 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:43,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1458534320, now seen corresponding path program 19 times [2021-06-05 21:57:43,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:43,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134298389] [2021-06-05 21:57:43,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134298389] [2021-06-05 21:57:43,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134298389] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:43,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:43,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940201685] [2021-06-05 21:57:43,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:43,184 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:43,291 INFO L93 Difference]: Finished difference Result 527 states and 1494 transitions. [2021-06-05 21:57:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:43,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:43,292 INFO L225 Difference]: With dead ends: 527 [2021-06-05 21:57:43,292 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 21:57:43,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 21:57:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 274. [2021-06-05 21:57:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.1355311355311355) internal successors, (856), 273 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 856 transitions. [2021-06-05 21:57:43,297 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 856 transitions. Word has length 18 [2021-06-05 21:57:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:43,297 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 856 transitions. [2021-06-05 21:57:43,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 856 transitions. [2021-06-05 21:57:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:43,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:43,297 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:43,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-05 21:57:43,298 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:43,298 INFO L82 PathProgramCache]: Analyzing trace with hash 5951976, now seen corresponding path program 20 times [2021-06-05 21:57:43,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:43,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769632625] [2021-06-05 21:57:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:43,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769632625] [2021-06-05 21:57:43,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769632625] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:43,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:43,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:43,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595496259] [2021-06-05 21:57:43,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:43,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:43,337 INFO L87 Difference]: Start difference. First operand 274 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:43,477 INFO L93 Difference]: Finished difference Result 517 states and 1473 transitions. [2021-06-05 21:57:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:43,478 INFO L225 Difference]: With dead ends: 517 [2021-06-05 21:57:43,478 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 21:57:43,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 21:57:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 285. [2021-06-05 21:57:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.1161971830985915) internal successors, (885), 284 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 885 transitions. [2021-06-05 21:57:43,483 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 885 transitions. Word has length 18 [2021-06-05 21:57:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:43,483 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 885 transitions. [2021-06-05 21:57:43,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 885 transitions. [2021-06-05 21:57:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:43,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:43,484 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:43,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-05 21:57:43,484 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash -760894172, now seen corresponding path program 21 times [2021-06-05 21:57:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:43,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813783151] [2021-06-05 21:57:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:43,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813783151] [2021-06-05 21:57:43,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813783151] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:43,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:43,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:43,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443846880] [2021-06-05 21:57:43,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:43,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:43,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:43,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:43,520 INFO L87 Difference]: Start difference. First operand 285 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:43,640 INFO L93 Difference]: Finished difference Result 486 states and 1416 transitions. [2021-06-05 21:57:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:43,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:43,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:43,641 INFO L225 Difference]: With dead ends: 486 [2021-06-05 21:57:43,641 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 21:57:43,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 21:57:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 270. [2021-06-05 21:57:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-05 21:57:43,646 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-05 21:57:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:43,646 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-05 21:57:43,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-05 21:57:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:43,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:43,646 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:43,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-06-05 21:57:43,646 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:43,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:43,647 INFO L82 PathProgramCache]: Analyzing trace with hash -755535640, now seen corresponding path program 18 times [2021-06-05 21:57:43,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:43,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22428299] [2021-06-05 21:57:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:43,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22428299] [2021-06-05 21:57:43,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22428299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:43,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015162645] [2021-06-05 21:57:43,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:43,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:57:43,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015162645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:43,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:43,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 21:57:43,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991974230] [2021-06-05 21:57:43,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:57:43,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:43,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:57:43,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:43,806 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:44,031 INFO L93 Difference]: Finished difference Result 822 states and 2325 transitions. [2021-06-05 21:57:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:57:44,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:44,032 INFO L225 Difference]: With dead ends: 822 [2021-06-05 21:57:44,032 INFO L226 Difference]: Without dead ends: 822 [2021-06-05 21:57:44,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:57:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-05 21:57:44,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 276. [2021-06-05 21:57:44,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1636363636363636) internal successors, (870), 275 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 870 transitions. [2021-06-05 21:57:44,037 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 870 transitions. Word has length 18 [2021-06-05 21:57:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:44,038 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 870 transitions. [2021-06-05 21:57:44,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 870 transitions. [2021-06-05 21:57:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:44,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:44,038 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:44,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:44,249 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash 877515752, now seen corresponding path program 19 times [2021-06-05 21:57:44,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:44,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442651103] [2021-06-05 21:57:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:44,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:44,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442651103] [2021-06-05 21:57:44,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442651103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:44,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014759391] [2021-06-05 21:57:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:44,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:44,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014759391] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:44,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:44,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 21:57:44,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716157229] [2021-06-05 21:57:44,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:44,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:44,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:44,387 INFO L87 Difference]: Start difference. First operand 276 states and 870 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:44,502 INFO L93 Difference]: Finished difference Result 512 states and 1502 transitions. [2021-06-05 21:57:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:44,503 INFO L225 Difference]: With dead ends: 512 [2021-06-05 21:57:44,503 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 21:57:44,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:57:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 21:57:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 279. [2021-06-05 21:57:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.183453237410072) internal successors, (885), 278 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 885 transitions. [2021-06-05 21:57:44,507 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 885 transitions. Word has length 18 [2021-06-05 21:57:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:44,507 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 885 transitions. [2021-06-05 21:57:44,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 885 transitions. [2021-06-05 21:57:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:44,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:44,507 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:44,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 21:57:44,721 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1079621204, now seen corresponding path program 20 times [2021-06-05 21:57:44,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:44,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225776381] [2021-06-05 21:57:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:44,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:44,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225776381] [2021-06-05 21:57:44,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225776381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:44,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532153190] [2021-06-05 21:57:44,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:44,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:44,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:44,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:44,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532153190] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:44,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:44,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 21:57:44,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905306872] [2021-06-05 21:57:44,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:44,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:44,864 INFO L87 Difference]: Start difference. First operand 279 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:44,968 INFO L93 Difference]: Finished difference Result 479 states and 1425 transitions. [2021-06-05 21:57:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:44,969 INFO L225 Difference]: With dead ends: 479 [2021-06-05 21:57:44,969 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 21:57:44,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:57:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 21:57:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 270. [2021-06-05 21:57:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-05 21:57:44,973 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-05 21:57:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:44,973 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-05 21:57:44,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-05 21:57:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:44,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:44,974 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:45,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:45,191 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash 209328886, now seen corresponding path program 21 times [2021-06-05 21:57:45,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:45,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693623354] [2021-06-05 21:57:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:45,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:45,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693623354] [2021-06-05 21:57:45,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693623354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:45,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874129099] [2021-06-05 21:57:45,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:45,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:57:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:45,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:45,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:45,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874129099] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:45,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:45,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:57:45,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131151859] [2021-06-05 21:57:45,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:45,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:45,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:45,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:45,344 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:45,491 INFO L93 Difference]: Finished difference Result 554 states and 1604 transitions. [2021-06-05 21:57:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:45,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:45,493 INFO L225 Difference]: With dead ends: 554 [2021-06-05 21:57:45,493 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 21:57:45,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:57:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 21:57:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 274. [2021-06-05 21:57:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.161172161172161) internal successors, (863), 273 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 863 transitions. [2021-06-05 21:57:45,497 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 863 transitions. Word has length 18 [2021-06-05 21:57:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:45,498 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 863 transitions. [2021-06-05 21:57:45,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 863 transitions. [2021-06-05 21:57:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:45,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:45,498 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:45,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:45,699 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:45,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:45,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1284578836, now seen corresponding path program 22 times [2021-06-05 21:57:45,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:45,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274695438] [2021-06-05 21:57:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:45,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:45,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274695438] [2021-06-05 21:57:45,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274695438] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:45,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:45,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:45,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376417193] [2021-06-05 21:57:45,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:45,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:45,741 INFO L87 Difference]: Start difference. First operand 274 states and 863 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:45,833 INFO L93 Difference]: Finished difference Result 540 states and 1553 transitions. [2021-06-05 21:57:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:45,834 INFO L225 Difference]: With dead ends: 540 [2021-06-05 21:57:45,834 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 21:57:45,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 21:57:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 280. [2021-06-05 21:57:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.150537634408602) internal successors, (879), 279 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 879 transitions. [2021-06-05 21:57:45,838 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 879 transitions. Word has length 18 [2021-06-05 21:57:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:45,838 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 879 transitions. [2021-06-05 21:57:45,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 879 transitions. [2021-06-05 21:57:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:45,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:45,839 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:45,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-06-05 21:57:45,839 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1824747200, now seen corresponding path program 22 times [2021-06-05 21:57:45,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:45,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612085964] [2021-06-05 21:57:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:45,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:45,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612085964] [2021-06-05 21:57:45,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612085964] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:45,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:45,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:45,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749369118] [2021-06-05 21:57:45,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:45,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:45,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:45,879 INFO L87 Difference]: Start difference. First operand 280 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:46,003 INFO L93 Difference]: Finished difference Result 543 states and 1546 transitions. [2021-06-05 21:57:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:46,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:46,004 INFO L225 Difference]: With dead ends: 543 [2021-06-05 21:57:46,004 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 21:57:46,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 21:57:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 291. [2021-06-05 21:57:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1310344827586207) internal successors, (908), 290 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 908 transitions. [2021-06-05 21:57:46,008 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 908 transitions. Word has length 18 [2021-06-05 21:57:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:46,008 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 908 transitions. [2021-06-05 21:57:46,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 908 transitions. [2021-06-05 21:57:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:46,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:46,009 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:46,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-06-05 21:57:46,009 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:46,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:46,009 INFO L82 PathProgramCache]: Analyzing trace with hash -102317272, now seen corresponding path program 23 times [2021-06-05 21:57:46,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:46,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103439488] [2021-06-05 21:57:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:46,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:46,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103439488] [2021-06-05 21:57:46,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103439488] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:46,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:46,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:46,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334947138] [2021-06-05 21:57:46,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:46,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:46,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:46,049 INFO L87 Difference]: Start difference. First operand 291 states and 908 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:46,173 INFO L93 Difference]: Finished difference Result 542 states and 1551 transitions. [2021-06-05 21:57:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:46,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:46,174 INFO L225 Difference]: With dead ends: 542 [2021-06-05 21:57:46,175 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 21:57:46,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 21:57:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 289. [2021-06-05 21:57:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1354166666666665) internal successors, (903), 288 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-06-05 21:57:46,179 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-06-05 21:57:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:46,179 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-06-05 21:57:46,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-06-05 21:57:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:46,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:46,179 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:46,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-06-05 21:57:46,179 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash 960729324, now seen corresponding path program 23 times [2021-06-05 21:57:46,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:46,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418747840] [2021-06-05 21:57:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:46,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418747840] [2021-06-05 21:57:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418747840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369365408] [2021-06-05 21:57:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:46,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:46,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:46,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369365408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:46,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:46,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:57:46,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865228347] [2021-06-05 21:57:46,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:57:46,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:57:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:46,333 INFO L87 Difference]: Start difference. First operand 289 states and 903 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:46,591 INFO L93 Difference]: Finished difference Result 752 states and 2121 transitions. [2021-06-05 21:57:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:46,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:46,592 INFO L225 Difference]: With dead ends: 752 [2021-06-05 21:57:46,592 INFO L226 Difference]: Without dead ends: 752 [2021-06-05 21:57:46,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-05 21:57:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 292. [2021-06-05 21:57:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.154639175257732) internal successors, (918), 291 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 918 transitions. [2021-06-05 21:57:46,597 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 918 transitions. Word has length 18 [2021-06-05 21:57:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:46,597 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 918 transitions. [2021-06-05 21:57:46,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 918 transitions. [2021-06-05 21:57:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:46,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:46,598 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:46,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 21:57:46,814 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:46,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:46,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2041895572, now seen corresponding path program 24 times [2021-06-05 21:57:46,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:46,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881601774] [2021-06-05 21:57:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:46,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:46,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881601774] [2021-06-05 21:57:46,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881601774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:46,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920374711] [2021-06-05 21:57:46,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:46,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:57:46,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:46,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:46,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920374711] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:47,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:47,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:57:47,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030155101] [2021-06-05 21:57:47,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:47,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:47,006 INFO L87 Difference]: Start difference. First operand 292 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:47,119 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-06-05 21:57:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:47,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:47,120 INFO L225 Difference]: With dead ends: 546 [2021-06-05 21:57:47,120 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 21:57:47,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:57:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 21:57:47,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 289. [2021-06-05 21:57:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1354166666666665) internal successors, (903), 288 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-06-05 21:57:47,124 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-06-05 21:57:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:47,124 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-06-05 21:57:47,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-06-05 21:57:47,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:47,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:47,125 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:47,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:47,325 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash 981465852, now seen corresponding path program 25 times [2021-06-05 21:57:47,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:47,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175836521] [2021-06-05 21:57:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:47,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175836521] [2021-06-05 21:57:47,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175836521] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:47,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:47,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:47,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150587615] [2021-06-05 21:57:47,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:47,361 INFO L87 Difference]: Start difference. First operand 289 states and 903 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:47,441 INFO L93 Difference]: Finished difference Result 506 states and 1473 transitions. [2021-06-05 21:57:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:47,442 INFO L225 Difference]: With dead ends: 506 [2021-06-05 21:57:47,442 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 21:57:47,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 21:57:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 293. [2021-06-05 21:57:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.1404109589041096) internal successors, (917), 292 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 917 transitions. [2021-06-05 21:57:47,446 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 917 transitions. Word has length 18 [2021-06-05 21:57:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:47,446 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 917 transitions. [2021-06-05 21:57:47,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 917 transitions. [2021-06-05 21:57:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:47,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:47,447 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:47,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-06-05 21:57:47,447 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash -933958074, now seen corresponding path program 26 times [2021-06-05 21:57:47,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:47,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584380805] [2021-06-05 21:57:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:47,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584380805] [2021-06-05 21:57:47,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584380805] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:47,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:47,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:47,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279053404] [2021-06-05 21:57:47,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:47,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:47,489 INFO L87 Difference]: Start difference. First operand 293 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:47,584 INFO L93 Difference]: Finished difference Result 524 states and 1524 transitions. [2021-06-05 21:57:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:47,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:47,585 INFO L225 Difference]: With dead ends: 524 [2021-06-05 21:57:47,585 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 21:57:47,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 21:57:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 291. [2021-06-05 21:57:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1448275862068966) internal successors, (912), 290 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 912 transitions. [2021-06-05 21:57:47,590 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 912 transitions. Word has length 18 [2021-06-05 21:57:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:47,590 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 912 transitions. [2021-06-05 21:57:47,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 912 transitions. [2021-06-05 21:57:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:47,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:47,590 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:47,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-06-05 21:57:47,590 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1193569328, now seen corresponding path program 24 times [2021-06-05 21:57:47,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:47,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887670872] [2021-06-05 21:57:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:47,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887670872] [2021-06-05 21:57:47,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887670872] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:47,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:47,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:47,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080919118] [2021-06-05 21:57:47,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:47,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:47,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:47,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:47,630 INFO L87 Difference]: Start difference. First operand 291 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:47,762 INFO L93 Difference]: Finished difference Result 518 states and 1506 transitions. [2021-06-05 21:57:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:47,763 INFO L225 Difference]: With dead ends: 518 [2021-06-05 21:57:47,763 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 21:57:47,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 21:57:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 276. [2021-06-05 21:57:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-06-05 21:57:47,773 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-06-05 21:57:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:47,773 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-06-05 21:57:47,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,773 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-06-05 21:57:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:47,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:47,774 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:47,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-06-05 21:57:47,774 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:47,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:47,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1775654886, now seen corresponding path program 25 times [2021-06-05 21:57:47,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:47,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851067183] [2021-06-05 21:57:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:47,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851067183] [2021-06-05 21:57:47,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851067183] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:47,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:47,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:47,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941790516] [2021-06-05 21:57:47,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:47,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:47,803 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:47,882 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-06-05 21:57:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:47,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:47,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:47,883 INFO L225 Difference]: With dead ends: 413 [2021-06-05 21:57:47,883 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 21:57:47,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 21:57:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 280. [2021-06-05 21:57:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.10752688172043) internal successors, (867), 279 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-06-05 21:57:47,887 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-06-05 21:57:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:47,888 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-06-05 21:57:47,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-06-05 21:57:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:47,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:47,889 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:47,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-06-05 21:57:47,889 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1054826114, now seen corresponding path program 26 times [2021-06-05 21:57:47,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:47,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184527276] [2021-06-05 21:57:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184527276] [2021-06-05 21:57:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184527276] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:47,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:47,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:47,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907385967] [2021-06-05 21:57:47,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:47,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:47,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:47,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:47,920 INFO L87 Difference]: Start difference. First operand 280 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:48,020 INFO L93 Difference]: Finished difference Result 434 states and 1236 transitions. [2021-06-05 21:57:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:48,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:48,021 INFO L225 Difference]: With dead ends: 434 [2021-06-05 21:57:48,021 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 21:57:48,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 21:57:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 291. [2021-06-05 21:57:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.089655172413793) internal successors, (896), 290 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 896 transitions. [2021-06-05 21:57:48,026 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 896 transitions. Word has length 18 [2021-06-05 21:57:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:48,026 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 896 transitions. [2021-06-05 21:57:48,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 896 transitions. [2021-06-05 21:57:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:48,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:48,027 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:48,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-06-05 21:57:48,027 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:48,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1821672262, now seen corresponding path program 27 times [2021-06-05 21:57:48,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:48,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143391946] [2021-06-05 21:57:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:48,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:48,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143391946] [2021-06-05 21:57:48,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143391946] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:48,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:48,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:48,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71368454] [2021-06-05 21:57:48,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:48,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:48,057 INFO L87 Difference]: Start difference. First operand 291 states and 896 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:48,147 INFO L93 Difference]: Finished difference Result 403 states and 1179 transitions. [2021-06-05 21:57:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:48,148 INFO L225 Difference]: With dead ends: 403 [2021-06-05 21:57:48,148 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 21:57:48,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 21:57:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 276. [2021-06-05 21:57:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-06-05 21:57:48,152 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-06-05 21:57:48,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:48,152 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-06-05 21:57:48,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-06-05 21:57:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:48,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:48,152 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:48,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-06-05 21:57:48,153 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1488855460, now seen corresponding path program 28 times [2021-06-05 21:57:48,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:48,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113979342] [2021-06-05 21:57:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:48,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:48,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113979342] [2021-06-05 21:57:48,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113979342] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:48,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:48,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:48,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754324786] [2021-06-05 21:57:48,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:48,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:48,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:48,180 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:48,270 INFO L93 Difference]: Finished difference Result 446 states and 1266 transitions. [2021-06-05 21:57:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:48,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:48,270 INFO L225 Difference]: With dead ends: 446 [2021-06-05 21:57:48,270 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 21:57:48,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 21:57:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 291. [2021-06-05 21:57:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.0965517241379312) internal successors, (898), 290 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 898 transitions. [2021-06-05 21:57:48,274 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 898 transitions. Word has length 18 [2021-06-05 21:57:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:48,275 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 898 transitions. [2021-06-05 21:57:48,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 898 transitions. [2021-06-05 21:57:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:48,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:48,275 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:48,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-06-05 21:57:48,275 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2039265688, now seen corresponding path program 29 times [2021-06-05 21:57:48,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:48,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277230938] [2021-06-05 21:57:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:48,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:48,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277230938] [2021-06-05 21:57:48,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277230938] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:48,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:48,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:48,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664647436] [2021-06-05 21:57:48,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:48,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:48,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:48,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:48,304 INFO L87 Difference]: Start difference. First operand 291 states and 898 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:48,404 INFO L93 Difference]: Finished difference Result 445 states and 1271 transitions. [2021-06-05 21:57:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:48,405 INFO L225 Difference]: With dead ends: 445 [2021-06-05 21:57:48,405 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 21:57:48,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 21:57:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 289. [2021-06-05 21:57:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1006944444444446) internal successors, (893), 288 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 893 transitions. [2021-06-05 21:57:48,409 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 893 transitions. Word has length 18 [2021-06-05 21:57:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:48,409 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 893 transitions. [2021-06-05 21:57:48,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 893 transitions. [2021-06-05 21:57:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:48,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:48,409 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:48,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-05 21:57:48,409 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:48,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:48,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1080210964, now seen corresponding path program 30 times [2021-06-05 21:57:48,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:48,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290618408] [2021-06-05 21:57:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:48,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:48,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290618408] [2021-06-05 21:57:48,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290618408] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:48,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:48,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:48,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140903666] [2021-06-05 21:57:48,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:48,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:48,436 INFO L87 Difference]: Start difference. First operand 289 states and 893 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:48,522 INFO L93 Difference]: Finished difference Result 419 states and 1219 transitions. [2021-06-05 21:57:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:48,523 INFO L225 Difference]: With dead ends: 419 [2021-06-05 21:57:48,523 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 21:57:48,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 21:57:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 284. [2021-06-05 21:57:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0989399293286217) internal successors, (877), 283 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 877 transitions. [2021-06-05 21:57:48,530 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 877 transitions. Word has length 18 [2021-06-05 21:57:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:48,530 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 877 transitions. [2021-06-05 21:57:48,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 877 transitions. [2021-06-05 21:57:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:48,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:48,531 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:48,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-06-05 21:57:48,531 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2028469348, now seen corresponding path program 27 times [2021-06-05 21:57:48,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:48,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006641228] [2021-06-05 21:57:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:48,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:48,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006641228] [2021-06-05 21:57:48,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006641228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:48,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547608062] [2021-06-05 21:57:48,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:48,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:57:48,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:48,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:48,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547608062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:48,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:48,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 21:57:48,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312451687] [2021-06-05 21:57:48,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:57:48,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:48,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:57:48,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:48,686 INFO L87 Difference]: Start difference. First operand 284 states and 877 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:48,799 INFO L93 Difference]: Finished difference Result 475 states and 1391 transitions. [2021-06-05 21:57:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:48,800 INFO L225 Difference]: With dead ends: 475 [2021-06-05 21:57:48,800 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 21:57:48,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:57:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 21:57:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2021-06-05 21:57:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.078853046594982) internal successors, (859), 279 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-06-05 21:57:48,804 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 18 [2021-06-05 21:57:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:48,804 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-06-05 21:57:48,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-06-05 21:57:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:48,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:48,804 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:49,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:49,017 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash -395417956, now seen corresponding path program 28 times [2021-06-05 21:57:49,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:49,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198808580] [2021-06-05 21:57:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:49,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198808580] [2021-06-05 21:57:49,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198808580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212489496] [2021-06-05 21:57:49,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:49,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:49,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:49,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:49,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212489496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:49,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:57:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035569053] [2021-06-05 21:57:49,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:57:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:57:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:57:49,139 INFO L87 Difference]: Start difference. First operand 280 states and 859 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:49,257 INFO L93 Difference]: Finished difference Result 479 states and 1383 transitions. [2021-06-05 21:57:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:49,258 INFO L225 Difference]: With dead ends: 479 [2021-06-05 21:57:49,258 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 21:57:49,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 21:57:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 279. [2021-06-05 21:57:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0719424460431655) internal successors, (854), 278 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 854 transitions. [2021-06-05 21:57:49,262 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 854 transitions. Word has length 18 [2021-06-05 21:57:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:49,262 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 854 transitions. [2021-06-05 21:57:49,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 854 transitions. [2021-06-05 21:57:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:49,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:49,262 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:49,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:49,478 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:49,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1942412384, now seen corresponding path program 29 times [2021-06-05 21:57:49,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:49,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899507737] [2021-06-05 21:57:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:49,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899507737] [2021-06-05 21:57:49,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899507737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602773692] [2021-06-05 21:57:49,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:49,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602773692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:49,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:57:49,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125577905] [2021-06-05 21:57:49,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:57:49,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:57:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:57:49,596 INFO L87 Difference]: Start difference. First operand 279 states and 854 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:49,694 INFO L93 Difference]: Finished difference Result 436 states and 1286 transitions. [2021-06-05 21:57:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:49,695 INFO L225 Difference]: With dead ends: 436 [2021-06-05 21:57:49,695 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 21:57:49,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 21:57:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 262. [2021-06-05 21:57:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0383141762452106) internal successors, (793), 261 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 793 transitions. [2021-06-05 21:57:49,699 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 793 transitions. Word has length 18 [2021-06-05 21:57:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:49,699 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 793 transitions. [2021-06-05 21:57:49,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 793 transitions. [2021-06-05 21:57:49,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:49,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:49,699 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:49,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 21:57:49,913 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1829110872, now seen corresponding path program 30 times [2021-06-05 21:57:49,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:49,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386106374] [2021-06-05 21:57:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:49,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386106374] [2021-06-05 21:57:49,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386106374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673569179] [2021-06-05 21:57:49,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:49,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:57:49,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673569179] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:50,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:50,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 21:57:50,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433245506] [2021-06-05 21:57:50,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:50,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:50,040 INFO L87 Difference]: Start difference. First operand 262 states and 793 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:50,122 INFO L93 Difference]: Finished difference Result 450 states and 1301 transitions. [2021-06-05 21:57:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:50,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:50,123 INFO L225 Difference]: With dead ends: 450 [2021-06-05 21:57:50,123 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 21:57:50,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:57:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 21:57:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 268. [2021-06-05 21:57:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0711610486891385) internal successors, (820), 267 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 820 transitions. [2021-06-05 21:57:50,127 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 820 transitions. Word has length 18 [2021-06-05 21:57:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:50,127 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 820 transitions. [2021-06-05 21:57:50,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 820 transitions. [2021-06-05 21:57:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:50,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:50,127 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:50,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 21:57:50,328 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:50,328 INFO L82 PathProgramCache]: Analyzing trace with hash 508719468, now seen corresponding path program 31 times [2021-06-05 21:57:50,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:50,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650314547] [2021-06-05 21:57:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:50,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650314547] [2021-06-05 21:57:50,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650314547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:50,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254733160] [2021-06-05 21:57:50,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254733160] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:50,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:50,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 21:57:50,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811091430] [2021-06-05 21:57:50,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:50,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:50,463 INFO L87 Difference]: Start difference. First operand 268 states and 820 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:50,575 INFO L93 Difference]: Finished difference Result 456 states and 1316 transitions. [2021-06-05 21:57:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:50,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:50,576 INFO L225 Difference]: With dead ends: 456 [2021-06-05 21:57:50,576 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 21:57:50,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:57:50,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 21:57:50,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 265. [2021-06-05 21:57:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0492424242424243) internal successors, (805), 264 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 805 transitions. [2021-06-05 21:57:50,580 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 805 transitions. Word has length 18 [2021-06-05 21:57:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:50,580 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 805 transitions. [2021-06-05 21:57:50,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 805 transitions. [2021-06-05 21:57:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:50,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:50,580 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:50,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:50,799 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:50,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2122286202, now seen corresponding path program 32 times [2021-06-05 21:57:50,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:50,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885478725] [2021-06-05 21:57:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:50,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885478725] [2021-06-05 21:57:50,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885478725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:50,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771864717] [2021-06-05 21:57:50,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:50,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:50,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:50,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771864717] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:50,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:50,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-06-05 21:57:50,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331404828] [2021-06-05 21:57:50,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:50,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:57:50,907 INFO L87 Difference]: Start difference. First operand 265 states and 805 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:51,003 INFO L93 Difference]: Finished difference Result 414 states and 1209 transitions. [2021-06-05 21:57:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:51,004 INFO L225 Difference]: With dead ends: 414 [2021-06-05 21:57:51,004 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 21:57:51,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:57:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 21:57:51,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 267. [2021-06-05 21:57:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.0526315789473686) internal successors, (812), 266 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 812 transitions. [2021-06-05 21:57:51,008 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 812 transitions. Word has length 18 [2021-06-05 21:57:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:51,008 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 812 transitions. [2021-06-05 21:57:51,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 812 transitions. [2021-06-05 21:57:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:51,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:51,008 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:51,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:51,209 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:51,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:51,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1312639000, now seen corresponding path program 31 times [2021-06-05 21:57:51,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:51,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297373518] [2021-06-05 21:57:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:51,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:51,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297373518] [2021-06-05 21:57:51,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297373518] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:51,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:51,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:51,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3321747] [2021-06-05 21:57:51,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:51,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:51,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:51,251 INFO L87 Difference]: Start difference. First operand 267 states and 812 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:51,353 INFO L93 Difference]: Finished difference Result 546 states and 1555 transitions. [2021-06-05 21:57:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:51,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:51,354 INFO L225 Difference]: With dead ends: 546 [2021-06-05 21:57:51,354 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 21:57:51,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 21:57:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 284. [2021-06-05 21:57:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.088339222614841) internal successors, (874), 283 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 874 transitions. [2021-06-05 21:57:51,358 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 874 transitions. Word has length 18 [2021-06-05 21:57:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:51,358 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 874 transitions. [2021-06-05 21:57:51,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 874 transitions. [2021-06-05 21:57:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:51,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:51,359 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:51,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-06-05 21:57:51,359 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1487916058, now seen corresponding path program 33 times [2021-06-05 21:57:51,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:51,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207738044] [2021-06-05 21:57:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:51,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:51,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207738044] [2021-06-05 21:57:51,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207738044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:51,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573749991] [2021-06-05 21:57:51,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:51,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:57:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:51,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:51,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573749991] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:51,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:51,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:57:51,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174051173] [2021-06-05 21:57:51,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:51,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:51,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:51,520 INFO L87 Difference]: Start difference. First operand 284 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:51,630 INFO L93 Difference]: Finished difference Result 500 states and 1465 transitions. [2021-06-05 21:57:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:51,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:51,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:51,631 INFO L225 Difference]: With dead ends: 500 [2021-06-05 21:57:51,631 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 21:57:51,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:57:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 21:57:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 289. [2021-06-05 21:57:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1215277777777777) internal successors, (899), 288 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 899 transitions. [2021-06-05 21:57:51,635 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 899 transitions. Word has length 18 [2021-06-05 21:57:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:51,635 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 899 transitions. [2021-06-05 21:57:51,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 899 transitions. [2021-06-05 21:57:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:51,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:51,635 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:51,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 21:57:51,851 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:51,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:51,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1313143516, now seen corresponding path program 34 times [2021-06-05 21:57:51,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:51,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897928106] [2021-06-05 21:57:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:51,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:51,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897928106] [2021-06-05 21:57:51,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897928106] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:51,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:51,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:51,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957042154] [2021-06-05 21:57:51,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:51,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:51,889 INFO L87 Difference]: Start difference. First operand 289 states and 899 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:51,986 INFO L93 Difference]: Finished difference Result 486 states and 1414 transitions. [2021-06-05 21:57:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:51,987 INFO L225 Difference]: With dead ends: 486 [2021-06-05 21:57:51,987 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 21:57:51,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 21:57:51,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 295. [2021-06-05 21:57:51,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0918367346938775) internal successors, (909), 294 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-06-05 21:57:51,991 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-06-05 21:57:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:51,991 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-06-05 21:57:51,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,991 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-06-05 21:57:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:51,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:51,993 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:51,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-06-05 21:57:51,993 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash -127799318, now seen corresponding path program 32 times [2021-06-05 21:57:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:51,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475652996] [2021-06-05 21:57:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:52,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475652996] [2021-06-05 21:57:52,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475652996] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:52,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:52,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:52,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623610407] [2021-06-05 21:57:52,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:52,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:52,037 INFO L87 Difference]: Start difference. First operand 295 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:52,132 INFO L93 Difference]: Finished difference Result 566 states and 1625 transitions. [2021-06-05 21:57:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:52,133 INFO L225 Difference]: With dead ends: 566 [2021-06-05 21:57:52,133 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 21:57:52,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 21:57:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 292. [2021-06-05 21:57:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.0962199312714778) internal successors, (901), 291 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 901 transitions. [2021-06-05 21:57:52,137 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 901 transitions. Word has length 18 [2021-06-05 21:57:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:52,137 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 901 transitions. [2021-06-05 21:57:52,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 901 transitions. [2021-06-05 21:57:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:52,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:52,138 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:52,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-05 21:57:52,138 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:52,138 INFO L82 PathProgramCache]: Analyzing trace with hash 127502256, now seen corresponding path program 33 times [2021-06-05 21:57:52,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:52,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164211171] [2021-06-05 21:57:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:52,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164211171] [2021-06-05 21:57:52,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164211171] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:52,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:52,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:52,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444486630] [2021-06-05 21:57:52,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:52,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:52,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:52,177 INFO L87 Difference]: Start difference. First operand 292 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:52,299 INFO L93 Difference]: Finished difference Result 592 states and 1667 transitions. [2021-06-05 21:57:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:52,300 INFO L225 Difference]: With dead ends: 592 [2021-06-05 21:57:52,300 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 21:57:52,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 21:57:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 296. [2021-06-05 21:57:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1016949152542375) internal successors, (915), 295 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 915 transitions. [2021-06-05 21:57:52,306 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 915 transitions. Word has length 18 [2021-06-05 21:57:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:52,306 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 915 transitions. [2021-06-05 21:57:52,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 915 transitions. [2021-06-05 21:57:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:52,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:52,306 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:52,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-06-05 21:57:52,306 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1799562216, now seen corresponding path program 34 times [2021-06-05 21:57:52,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:52,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377114866] [2021-06-05 21:57:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:52,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377114866] [2021-06-05 21:57:52,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377114866] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:52,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:52,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:52,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770010412] [2021-06-05 21:57:52,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:52,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:52,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:52,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:52,344 INFO L87 Difference]: Start difference. First operand 296 states and 915 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:52,496 INFO L93 Difference]: Finished difference Result 567 states and 1631 transitions. [2021-06-05 21:57:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:52,510 INFO L225 Difference]: With dead ends: 567 [2021-06-05 21:57:52,510 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 21:57:52,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 21:57:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 294. [2021-06-05 21:57:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.10580204778157) internal successors, (910), 293 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-06-05 21:57:52,514 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-06-05 21:57:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:52,514 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-06-05 21:57:52,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-06-05 21:57:52,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:52,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:52,515 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:52,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-06-05 21:57:52,515 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:52,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:52,515 INFO L82 PathProgramCache]: Analyzing trace with hash -736515620, now seen corresponding path program 35 times [2021-06-05 21:57:52,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:52,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318120534] [2021-06-05 21:57:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:52,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318120534] [2021-06-05 21:57:52,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318120534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:52,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113064147] [2021-06-05 21:57:52,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:52,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:52,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:52,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:52,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113064147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:52,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:52,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 21:57:52,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831936306] [2021-06-05 21:57:52,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:57:52,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:57:52,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:57:52,731 INFO L87 Difference]: Start difference. First operand 294 states and 910 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:53,117 INFO L93 Difference]: Finished difference Result 756 states and 2106 transitions. [2021-06-05 21:57:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:53,118 INFO L225 Difference]: With dead ends: 756 [2021-06-05 21:57:53,118 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 21:57:53,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 21:57:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 297. [2021-06-05 21:57:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.125) internal successors, (925), 296 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 925 transitions. [2021-06-05 21:57:53,123 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 925 transitions. Word has length 18 [2021-06-05 21:57:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:53,123 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 925 transitions. [2021-06-05 21:57:53,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 925 transitions. [2021-06-05 21:57:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:53,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:53,123 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:53,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:53,324 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash 555826780, now seen corresponding path program 36 times [2021-06-05 21:57:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:53,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295582492] [2021-06-05 21:57:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:53,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:53,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295582492] [2021-06-05 21:57:53,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295582492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:53,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402023722] [2021-06-05 21:57:53,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:53,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:57:53,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:53,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402023722] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:53,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:53,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:57:53,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733578777] [2021-06-05 21:57:53,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:53,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:53,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:53,477 INFO L87 Difference]: Start difference. First operand 297 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:53,624 INFO L93 Difference]: Finished difference Result 528 states and 1554 transitions. [2021-06-05 21:57:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:53,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:53,625 INFO L225 Difference]: With dead ends: 528 [2021-06-05 21:57:53,625 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 21:57:53,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:57:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 21:57:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 294. [2021-06-05 21:57:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.10580204778157) internal successors, (910), 293 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-06-05 21:57:53,629 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-06-05 21:57:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:53,629 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-06-05 21:57:53,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-06-05 21:57:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:53,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:53,629 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:53,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 21:57:53,830 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:53,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:53,830 INFO L82 PathProgramCache]: Analyzing trace with hash -715779092, now seen corresponding path program 37 times [2021-06-05 21:57:53,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:53,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268796862] [2021-06-05 21:57:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:53,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:53,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268796862] [2021-06-05 21:57:53,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268796862] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:53,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:53,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:53,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99925512] [2021-06-05 21:57:53,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:53,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:53,873 INFO L87 Difference]: Start difference. First operand 294 states and 910 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:53,978 INFO L93 Difference]: Finished difference Result 525 states and 1502 transitions. [2021-06-05 21:57:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:53,979 INFO L225 Difference]: With dead ends: 525 [2021-06-05 21:57:53,979 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 21:57:53,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:53,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 21:57:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 298. [2021-06-05 21:57:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.111111111111111) internal successors, (924), 297 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-06-05 21:57:53,983 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-06-05 21:57:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:53,983 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-06-05 21:57:53,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-06-05 21:57:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:53,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:53,984 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:53,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-06-05 21:57:53,984 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:53,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1663764278, now seen corresponding path program 38 times [2021-06-05 21:57:53,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:53,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490406833] [2021-06-05 21:57:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:54,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490406833] [2021-06-05 21:57:54,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490406833] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:54,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:54,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:54,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014675131] [2021-06-05 21:57:54,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:54,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:54,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:54,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:54,034 INFO L87 Difference]: Start difference. First operand 298 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:54,161 INFO L93 Difference]: Finished difference Result 531 states and 1503 transitions. [2021-06-05 21:57:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:57:54,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:54,161 INFO L225 Difference]: With dead ends: 531 [2021-06-05 21:57:54,162 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 21:57:54,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 21:57:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 296. [2021-06-05 21:57:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1152542372881356) internal successors, (919), 295 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 919 transitions. [2021-06-05 21:57:54,166 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 919 transitions. Word has length 18 [2021-06-05 21:57:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:54,166 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 919 transitions. [2021-06-05 21:57:54,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 919 transitions. [2021-06-05 21:57:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:54,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:54,166 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:54,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-06-05 21:57:54,166 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash -220184744, now seen corresponding path program 35 times [2021-06-05 21:57:54,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:54,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963948726] [2021-06-05 21:57:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:54,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963948726] [2021-06-05 21:57:54,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963948726] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:54,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:54,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:54,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620940410] [2021-06-05 21:57:54,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:54,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:54,211 INFO L87 Difference]: Start difference. First operand 296 states and 919 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:54,326 INFO L93 Difference]: Finished difference Result 638 states and 1819 transitions. [2021-06-05 21:57:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:54,327 INFO L225 Difference]: With dead ends: 638 [2021-06-05 21:57:54,327 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 21:57:54,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 21:57:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 299. [2021-06-05 21:57:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.134228187919463) internal successors, (934), 298 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 934 transitions. [2021-06-05 21:57:54,331 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 934 transitions. Word has length 18 [2021-06-05 21:57:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:54,332 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 934 transitions. [2021-06-05 21:57:54,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 934 transitions. [2021-06-05 21:57:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:54,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:54,332 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:54,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-06-05 21:57:54,332 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1404153024, now seen corresponding path program 36 times [2021-06-05 21:57:54,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:54,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236358649] [2021-06-05 21:57:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:54,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236358649] [2021-06-05 21:57:54,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236358649] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:54,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:54,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:54,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052019162] [2021-06-05 21:57:54,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:54,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:54,374 INFO L87 Difference]: Start difference. First operand 299 states and 934 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:54,511 INFO L93 Difference]: Finished difference Result 599 states and 1729 transitions. [2021-06-05 21:57:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:54,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:54,512 INFO L225 Difference]: With dead ends: 599 [2021-06-05 21:57:54,512 INFO L226 Difference]: Without dead ends: 599 [2021-06-05 21:57:54,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-05 21:57:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 295. [2021-06-05 21:57:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.1054421768707483) internal successors, (913), 294 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 913 transitions. [2021-06-05 21:57:54,516 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 913 transitions. Word has length 18 [2021-06-05 21:57:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:54,516 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 913 transitions. [2021-06-05 21:57:54,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 913 transitions. [2021-06-05 21:57:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:54,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:54,517 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:54,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-06-05 21:57:54,517 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1984926374, now seen corresponding path program 37 times [2021-06-05 21:57:54,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:54,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601659440] [2021-06-05 21:57:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601659440] [2021-06-05 21:57:54,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601659440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:54,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:54,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:54,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883036441] [2021-06-05 21:57:54,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:54,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:54,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:54,556 INFO L87 Difference]: Start difference. First operand 295 states and 913 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:54,690 INFO L93 Difference]: Finished difference Result 556 states and 1586 transitions. [2021-06-05 21:57:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:54,691 INFO L225 Difference]: With dead ends: 556 [2021-06-05 21:57:54,691 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 21:57:54,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 21:57:54,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 303. [2021-06-05 21:57:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.109271523178808) internal successors, (939), 302 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 939 transitions. [2021-06-05 21:57:54,696 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 939 transitions. Word has length 18 [2021-06-05 21:57:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:54,696 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 939 transitions. [2021-06-05 21:57:54,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 939 transitions. [2021-06-05 21:57:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:54,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:54,696 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:54,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-06-05 21:57:54,696 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash 382976450, now seen corresponding path program 38 times [2021-06-05 21:57:54,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:54,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049994800] [2021-06-05 21:57:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:54,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049994800] [2021-06-05 21:57:54,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049994800] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:54,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:54,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:54,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192355653] [2021-06-05 21:57:54,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:54,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:54,744 INFO L87 Difference]: Start difference. First operand 303 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:54,862 INFO L93 Difference]: Finished difference Result 555 states and 1591 transitions. [2021-06-05 21:57:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:54,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:54,863 INFO L225 Difference]: With dead ends: 555 [2021-06-05 21:57:54,863 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 21:57:54,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 21:57:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 299. [2021-06-05 21:57:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.1040268456375837) internal successors, (925), 298 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 925 transitions. [2021-06-05 21:57:54,867 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 925 transitions. Word has length 18 [2021-06-05 21:57:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:54,867 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 925 transitions. [2021-06-05 21:57:54,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 925 transitions. [2021-06-05 21:57:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:54,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:54,867 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:54,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-06-05 21:57:54,868 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2139163544, now seen corresponding path program 39 times [2021-06-05 21:57:54,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:54,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904933359] [2021-06-05 21:57:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:54,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904933359] [2021-06-05 21:57:54,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904933359] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:54,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:54,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:54,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447304256] [2021-06-05 21:57:54,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:54,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:54,900 INFO L87 Difference]: Start difference. First operand 299 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:55,012 INFO L93 Difference]: Finished difference Result 571 states and 1638 transitions. [2021-06-05 21:57:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:55,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:55,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:55,013 INFO L225 Difference]: With dead ends: 571 [2021-06-05 21:57:55,013 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 21:57:55,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 21:57:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 297. [2021-06-05 21:57:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.108108108108108) internal successors, (920), 296 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 920 transitions. [2021-06-05 21:57:55,017 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 920 transitions. Word has length 18 [2021-06-05 21:57:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:55,017 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 920 transitions. [2021-06-05 21:57:55,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 920 transitions. [2021-06-05 21:57:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:55,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:55,018 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:55,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-06-05 21:57:55,018 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:55,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1023537320, now seen corresponding path program 39 times [2021-06-05 21:57:55,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:55,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799900403] [2021-06-05 21:57:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:55,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:55,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799900403] [2021-06-05 21:57:55,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799900403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:55,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579915063] [2021-06-05 21:57:55,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:55,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:57:55,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:55,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:55,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:55,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579915063] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:55,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:55,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:57:55,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126564253] [2021-06-05 21:57:55,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:55,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:55,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:55,157 INFO L87 Difference]: Start difference. First operand 297 states and 920 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:55,260 INFO L93 Difference]: Finished difference Result 521 states and 1542 transitions. [2021-06-05 21:57:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:55,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:55,261 INFO L225 Difference]: With dead ends: 521 [2021-06-05 21:57:55,261 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 21:57:55,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:57:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 21:57:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 298. [2021-06-05 21:57:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.1043771043771042) internal successors, (922), 297 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 922 transitions. [2021-06-05 21:57:55,266 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 922 transitions. Word has length 18 [2021-06-05 21:57:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:55,266 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 922 transitions. [2021-06-05 21:57:55,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 922 transitions. [2021-06-05 21:57:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:55,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:55,266 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:55,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 21:57:55,482 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:55,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1979087576, now seen corresponding path program 40 times [2021-06-05 21:57:55,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:55,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853015467] [2021-06-05 21:57:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:55,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:55,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853015467] [2021-06-05 21:57:55,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853015467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:55,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483386513] [2021-06-05 21:57:55,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:55,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:55,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:55,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:55,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:55,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483386513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:55,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:55,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:57:55,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082772664] [2021-06-05 21:57:55,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:57:55,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:57:55,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:55,616 INFO L87 Difference]: Start difference. First operand 298 states and 922 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:55,817 INFO L93 Difference]: Finished difference Result 640 states and 1839 transitions. [2021-06-05 21:57:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:57:55,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:55,818 INFO L225 Difference]: With dead ends: 640 [2021-06-05 21:57:55,818 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 21:57:55,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 21:57:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 287. [2021-06-05 21:57:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0944055944055946) internal successors, (885), 286 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 885 transitions. [2021-06-05 21:57:55,823 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 885 transitions. Word has length 18 [2021-06-05 21:57:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:55,823 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 885 transitions. [2021-06-05 21:57:55,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 885 transitions. [2021-06-05 21:57:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:55,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:55,823 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:56,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:56,024 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:56,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1938415430, now seen corresponding path program 41 times [2021-06-05 21:57:56,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:56,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442500018] [2021-06-05 21:57:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:56,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442500018] [2021-06-05 21:57:56,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442500018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:56,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676508865] [2021-06-05 21:57:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:56,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:56,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:57:56,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676508865] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:56,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:57:56,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:57:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336155105] [2021-06-05 21:57:56,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:56,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:56,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:56,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:56,165 INFO L87 Difference]: Start difference. First operand 287 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:56,273 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-06-05 21:57:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:56,273 INFO L225 Difference]: With dead ends: 511 [2021-06-05 21:57:56,274 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 21:57:56,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:57:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 21:57:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-06-05 21:57:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0848056537102475) internal successors, (873), 283 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 873 transitions. [2021-06-05 21:57:56,277 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 873 transitions. Word has length 18 [2021-06-05 21:57:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:56,278 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 873 transitions. [2021-06-05 21:57:56,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 873 transitions. [2021-06-05 21:57:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:56,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:56,278 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:56,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 21:57:56,485 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -223183330, now seen corresponding path program 42 times [2021-06-05 21:57:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:56,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548733741] [2021-06-05 21:57:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:56,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548733741] [2021-06-05 21:57:56,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548733741] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:56,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:56,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:56,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522638930] [2021-06-05 21:57:56,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:56,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:56,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:56,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:56,518 INFO L87 Difference]: Start difference. First operand 284 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:56,595 INFO L93 Difference]: Finished difference Result 422 states and 1234 transitions. [2021-06-05 21:57:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:56,596 INFO L225 Difference]: With dead ends: 422 [2021-06-05 21:57:56,596 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 21:57:56,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 21:57:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 298. [2021-06-05 21:57:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0707070707070705) internal successors, (912), 297 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 912 transitions. [2021-06-05 21:57:56,600 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 912 transitions. Word has length 18 [2021-06-05 21:57:56,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:56,600 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 912 transitions. [2021-06-05 21:57:56,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,600 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 912 transitions. [2021-06-05 21:57:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:56,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:56,601 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:56,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-06-05 21:57:56,601 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2138607256, now seen corresponding path program 43 times [2021-06-05 21:57:56,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:56,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859856593] [2021-06-05 21:57:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:56,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859856593] [2021-06-05 21:57:56,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859856593] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:56,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:56,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:56,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884284517] [2021-06-05 21:57:56,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:56,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:56,642 INFO L87 Difference]: Start difference. First operand 298 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:56,732 INFO L93 Difference]: Finished difference Result 462 states and 1340 transitions. [2021-06-05 21:57:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:56,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:56,733 INFO L225 Difference]: With dead ends: 462 [2021-06-05 21:57:56,733 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 21:57:56,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 21:57:56,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 296. [2021-06-05 21:57:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.074576271186441) internal successors, (907), 295 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 907 transitions. [2021-06-05 21:57:56,737 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 907 transitions. Word has length 18 [2021-06-05 21:57:56,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:56,737 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 907 transitions. [2021-06-05 21:57:56,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 907 transitions. [2021-06-05 21:57:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:56,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:56,737 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:56,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-06-05 21:57:56,737 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash 827662620, now seen corresponding path program 44 times [2021-06-05 21:57:56,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:56,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243679907] [2021-06-05 21:57:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:56,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243679907] [2021-06-05 21:57:56,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243679907] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:56,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:56,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:56,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769151476] [2021-06-05 21:57:56,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:56,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:56,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:56,775 INFO L87 Difference]: Start difference. First operand 296 states and 907 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:56,882 INFO L93 Difference]: Finished difference Result 442 states and 1284 transitions. [2021-06-05 21:57:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:57:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:56,882 INFO L225 Difference]: With dead ends: 442 [2021-06-05 21:57:56,882 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 21:57:56,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 21:57:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 286. [2021-06-05 21:57:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.0807017543859647) internal successors, (878), 285 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 878 transitions. [2021-06-05 21:57:56,886 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 878 transitions. Word has length 18 [2021-06-05 21:57:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:56,886 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 878 transitions. [2021-06-05 21:57:56,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 878 transitions. [2021-06-05 21:57:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:56,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:56,886 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:56,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-06-05 21:57:56,887 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash -150074708, now seen corresponding path program 40 times [2021-06-05 21:57:56,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:56,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954504719] [2021-06-05 21:57:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:56,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954504719] [2021-06-05 21:57:56,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954504719] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:56,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:56,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:56,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798594322] [2021-06-05 21:57:56,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:56,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:56,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:56,920 INFO L87 Difference]: Start difference. First operand 286 states and 878 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,010 INFO L93 Difference]: Finished difference Result 508 states and 1470 transitions. [2021-06-05 21:57:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,011 INFO L225 Difference]: With dead ends: 508 [2021-06-05 21:57:57,011 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 21:57:57,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 21:57:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 287. [2021-06-05 21:57:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.076923076923077) internal successors, (880), 286 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 880 transitions. [2021-06-05 21:57:57,015 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 880 transitions. Word has length 18 [2021-06-05 21:57:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,015 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 880 transitions. [2021-06-05 21:57:57,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 880 transitions. [2021-06-05 21:57:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:57,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,015 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-06-05 21:57:57,016 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1474263060, now seen corresponding path program 41 times [2021-06-05 21:57:57,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062946556] [2021-06-05 21:57:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062946556] [2021-06-05 21:57:57,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062946556] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:57,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:57,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:57,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771088170] [2021-06-05 21:57:57,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:57,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:57,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:57,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:57,058 INFO L87 Difference]: Start difference. First operand 287 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,169 INFO L93 Difference]: Finished difference Result 511 states and 1476 transitions. [2021-06-05 21:57:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:57,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,170 INFO L225 Difference]: With dead ends: 511 [2021-06-05 21:57:57,170 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 21:57:57,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 21:57:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-06-05 21:57:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.056537102473498) internal successors, (865), 283 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 865 transitions. [2021-06-05 21:57:57,174 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 865 transitions. Word has length 18 [2021-06-05 21:57:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,174 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 865 transitions. [2021-06-05 21:57:57,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 865 transitions. [2021-06-05 21:57:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:57,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,174 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-06-05 21:57:57,174 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1780468438, now seen corresponding path program 42 times [2021-06-05 21:57:57,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415394208] [2021-06-05 21:57:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415394208] [2021-06-05 21:57:57,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415394208] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:57,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:57,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:57,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74508670] [2021-06-05 21:57:57,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:57,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:57,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:57,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:57,211 INFO L87 Difference]: Start difference. First operand 284 states and 865 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,314 INFO L93 Difference]: Finished difference Result 502 states and 1444 transitions. [2021-06-05 21:57:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,315 INFO L225 Difference]: With dead ends: 502 [2021-06-05 21:57:57,315 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 21:57:57,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 21:57:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 273. [2021-06-05 21:57:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0661764705882355) internal successors, (834), 272 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 834 transitions. [2021-06-05 21:57:57,319 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 834 transitions. Word has length 18 [2021-06-05 21:57:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,319 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 834 transitions. [2021-06-05 21:57:57,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 834 transitions. [2021-06-05 21:57:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:57,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,319 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-06-05 21:57:57,320 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash -388587486, now seen corresponding path program 43 times [2021-06-05 21:57:57,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006810974] [2021-06-05 21:57:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006810974] [2021-06-05 21:57:57,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006810974] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:57,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:57,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:57,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096472675] [2021-06-05 21:57:57,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:57,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:57,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:57,351 INFO L87 Difference]: Start difference. First operand 273 states and 834 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,459 INFO L93 Difference]: Finished difference Result 421 states and 1245 transitions. [2021-06-05 21:57:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:57,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,460 INFO L225 Difference]: With dead ends: 421 [2021-06-05 21:57:57,460 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 21:57:57,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 21:57:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 290. [2021-06-05 21:57:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.069204152249135) internal successors, (887), 289 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 887 transitions. [2021-06-05 21:57:57,463 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 887 transitions. Word has length 18 [2021-06-05 21:57:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,463 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 887 transitions. [2021-06-05 21:57:57,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 887 transitions. [2021-06-05 21:57:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:57,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,464 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-06-05 21:57:57,464 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1829025804, now seen corresponding path program 44 times [2021-06-05 21:57:57,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119200837] [2021-06-05 21:57:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119200837] [2021-06-05 21:57:57,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119200837] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:57,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:57,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:57,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392511765] [2021-06-05 21:57:57,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:57,494 INFO L87 Difference]: Start difference. First operand 290 states and 887 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,617 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-06-05 21:57:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,625 INFO L225 Difference]: With dead ends: 423 [2021-06-05 21:57:57,625 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 21:57:57,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 21:57:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 287. [2021-06-05 21:57:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0734265734265733) internal successors, (879), 286 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 879 transitions. [2021-06-05 21:57:57,629 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 879 transitions. Word has length 18 [2021-06-05 21:57:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,629 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 879 transitions. [2021-06-05 21:57:57,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 879 transitions. [2021-06-05 21:57:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:57,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,629 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-06-05 21:57:57,629 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash -753314648, now seen corresponding path program 45 times [2021-06-05 21:57:57,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484232746] [2021-06-05 21:57:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484232746] [2021-06-05 21:57:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484232746] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:57,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369047089] [2021-06-05 21:57:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:57,662 INFO L87 Difference]: Start difference. First operand 287 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,775 INFO L93 Difference]: Finished difference Result 457 states and 1358 transitions. [2021-06-05 21:57:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,776 INFO L225 Difference]: With dead ends: 457 [2021-06-05 21:57:57,776 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 21:57:57,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 21:57:57,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 284. [2021-06-05 21:57:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.07773851590106) internal successors, (871), 283 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-06-05 21:57:57,779 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-06-05 21:57:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,780 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-06-05 21:57:57,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-06-05 21:57:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:57,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,780 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-06-05 21:57:57,780 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1623768616, now seen corresponding path program 46 times [2021-06-05 21:57:57,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025024199] [2021-06-05 21:57:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025024199] [2021-06-05 21:57:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025024199] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:57,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:57,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:57,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820915444] [2021-06-05 21:57:57,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:57,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:57,816 INFO L87 Difference]: Start difference. First operand 284 states and 871 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,951 INFO L93 Difference]: Finished difference Result 519 states and 1486 transitions. [2021-06-05 21:57:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,952 INFO L225 Difference]: With dead ends: 519 [2021-06-05 21:57:57,952 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 21:57:57,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 21:57:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 291. [2021-06-05 21:57:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1) internal successors, (899), 290 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 899 transitions. [2021-06-05 21:57:57,956 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 899 transitions. Word has length 18 [2021-06-05 21:57:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,956 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 899 transitions. [2021-06-05 21:57:57,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 899 transitions. [2021-06-05 21:57:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:57,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,956 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-06-05 21:57:57,957 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 183330298, now seen corresponding path program 47 times [2021-06-05 21:57:57,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613119805] [2021-06-05 21:57:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613119805] [2021-06-05 21:57:57,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613119805] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:57,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:57,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:57,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690208967] [2021-06-05 21:57:57,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:57,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:57,991 INFO L87 Difference]: Start difference. First operand 291 states and 899 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,116 INFO L93 Difference]: Finished difference Result 528 states and 1521 transitions. [2021-06-05 21:57:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:58,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,117 INFO L225 Difference]: With dead ends: 528 [2021-06-05 21:57:58,117 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 21:57:58,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 21:57:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 285. [2021-06-05 21:57:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-06-05 21:57:58,121 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-06-05 21:57:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,121 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-06-05 21:57:58,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-06-05 21:57:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:58,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,121 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:58,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-06-05 21:57:58,122 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:58,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:58,122 INFO L82 PathProgramCache]: Analyzing trace with hash 438631872, now seen corresponding path program 48 times [2021-06-05 21:57:58,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:58,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124135032] [2021-06-05 21:57:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124135032] [2021-06-05 21:57:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124135032] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:58,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:58,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:58,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149968912] [2021-06-05 21:57:58,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:58,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:58,154 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,235 INFO L93 Difference]: Finished difference Result 476 states and 1379 transitions. [2021-06-05 21:57:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,236 INFO L225 Difference]: With dead ends: 476 [2021-06-05 21:57:58,236 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 21:57:58,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 21:57:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 289. [2021-06-05 21:57:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.09375) internal successors, (891), 288 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 891 transitions. [2021-06-05 21:57:58,240 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 891 transitions. Word has length 18 [2021-06-05 21:57:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,240 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 891 transitions. [2021-06-05 21:57:58,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 891 transitions. [2021-06-05 21:57:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:58,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,240 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:58,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-06-05 21:57:58,240 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:58,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1488432600, now seen corresponding path program 49 times [2021-06-05 21:57:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:58,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452925539] [2021-06-05 21:57:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:58,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452925539] [2021-06-05 21:57:58,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452925539] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:58,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:58,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:58,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344208575] [2021-06-05 21:57:58,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:58,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:58,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:58,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:58,280 INFO L87 Difference]: Start difference. First operand 289 states and 891 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,368 INFO L93 Difference]: Finished difference Result 451 states and 1343 transitions. [2021-06-05 21:57:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:58,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,369 INFO L225 Difference]: With dead ends: 451 [2021-06-05 21:57:58,369 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 21:57:58,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 21:57:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 287. [2021-06-05 21:57:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.097902097902098) internal successors, (886), 286 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 886 transitions. [2021-06-05 21:57:58,372 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 886 transitions. Word has length 18 [2021-06-05 21:57:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,372 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 886 transitions. [2021-06-05 21:57:58,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 886 transitions. [2021-06-05 21:57:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:58,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,373 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:58,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-06-05 21:57:58,373 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:58,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:58,373 INFO L82 PathProgramCache]: Analyzing trace with hash 90944872, now seen corresponding path program 50 times [2021-06-05 21:57:58,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:58,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986893763] [2021-06-05 21:57:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:58,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986893763] [2021-06-05 21:57:58,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986893763] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:58,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:58,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:58,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940422016] [2021-06-05 21:57:58,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:58,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:58,423 INFO L87 Difference]: Start difference. First operand 287 states and 886 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,548 INFO L93 Difference]: Finished difference Result 511 states and 1492 transitions. [2021-06-05 21:57:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,549 INFO L225 Difference]: With dead ends: 511 [2021-06-05 21:57:58,549 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 21:57:58,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 21:57:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 290. [2021-06-05 21:57:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.1176470588235294) internal successors, (901), 289 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 901 transitions. [2021-06-05 21:57:58,553 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 901 transitions. Word has length 18 [2021-06-05 21:57:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,554 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 901 transitions. [2021-06-05 21:57:58,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 901 transitions. [2021-06-05 21:57:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:58,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,554 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:58,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-06-05 21:57:58,554 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:58,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1715282640, now seen corresponding path program 51 times [2021-06-05 21:57:58,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:58,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778673816] [2021-06-05 21:57:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:58,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778673816] [2021-06-05 21:57:58,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778673816] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:58,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:58,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:58,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543517460] [2021-06-05 21:57:58,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:58,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:58,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:58,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:58,595 INFO L87 Difference]: Start difference. First operand 290 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,700 INFO L93 Difference]: Finished difference Result 475 states and 1412 transitions. [2021-06-05 21:57:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:58,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,701 INFO L225 Difference]: With dead ends: 475 [2021-06-05 21:57:58,701 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 21:57:58,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 21:57:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 286. [2021-06-05 21:57:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.087719298245614) internal successors, (880), 285 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-06-05 21:57:58,705 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-06-05 21:57:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,705 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-06-05 21:57:58,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-06-05 21:57:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:58,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,705 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:58,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-06-05 21:57:58,705 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:58,705 INFO L82 PathProgramCache]: Analyzing trace with hash 677704442, now seen corresponding path program 52 times [2021-06-05 21:57:58,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:58,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231263342] [2021-06-05 21:57:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:58,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231263342] [2021-06-05 21:57:58,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231263342] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:58,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:58,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:58,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986410980] [2021-06-05 21:57:58,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:58,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:58,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:58,745 INFO L87 Difference]: Start difference. First operand 286 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,847 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2021-06-05 21:57:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:58,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,848 INFO L225 Difference]: With dead ends: 553 [2021-06-05 21:57:58,848 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 21:57:58,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 21:57:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-06-05 21:57:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.0972222222222223) internal successors, (892), 288 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 892 transitions. [2021-06-05 21:57:58,852 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 892 transitions. Word has length 18 [2021-06-05 21:57:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,852 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 892 transitions. [2021-06-05 21:57:58,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 892 transitions. [2021-06-05 21:57:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:58,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,853 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:58,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-06-05 21:57:58,853 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1850997812, now seen corresponding path program 53 times [2021-06-05 21:57:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:58,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219390205] [2021-06-05 21:57:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:58,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219390205] [2021-06-05 21:57:58,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219390205] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:58,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:58,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:58,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580348613] [2021-06-05 21:57:58,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:58,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:58,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:58,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:58,887 INFO L87 Difference]: Start difference. First operand 289 states and 892 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,997 INFO L93 Difference]: Finished difference Result 531 states and 1576 transitions. [2021-06-05 21:57:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,998 INFO L225 Difference]: With dead ends: 531 [2021-06-05 21:57:58,998 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 21:57:58,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:58,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 21:57:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 292. [2021-06-05 21:57:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1168384879725086) internal successors, (907), 291 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 907 transitions. [2021-06-05 21:57:59,002 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 907 transitions. Word has length 18 [2021-06-05 21:57:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:59,002 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 907 transitions. [2021-06-05 21:57:59,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 907 transitions. [2021-06-05 21:57:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:59,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:59,002 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-06-05 21:57:59,002 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,003 INFO L82 PathProgramCache]: Analyzing trace with hash -819631716, now seen corresponding path program 54 times [2021-06-05 21:57:59,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170794921] [2021-06-05 21:57:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170794921] [2021-06-05 21:57:59,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170794921] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:59,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:59,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231806573] [2021-06-05 21:57:59,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:59,037 INFO L87 Difference]: Start difference. First operand 292 states and 907 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:59,127 INFO L93 Difference]: Finished difference Result 489 states and 1481 transitions. [2021-06-05 21:57:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:59,128 INFO L225 Difference]: With dead ends: 489 [2021-06-05 21:57:59,128 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 21:57:59,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 21:57:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 285. [2021-06-05 21:57:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0809859154929575) internal successors, (875), 284 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 875 transitions. [2021-06-05 21:57:59,131 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 875 transitions. Word has length 18 [2021-06-05 21:57:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:59,131 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 875 transitions. [2021-06-05 21:57:59,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 875 transitions. [2021-06-05 21:57:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:59,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:59,132 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-06-05 21:57:59,132 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,132 INFO L82 PathProgramCache]: Analyzing trace with hash 775146144, now seen corresponding path program 55 times [2021-06-05 21:57:59,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358331828] [2021-06-05 21:57:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358331828] [2021-06-05 21:57:59,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358331828] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:59,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:59,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:59,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470963914] [2021-06-05 21:57:59,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:59,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:59,167 INFO L87 Difference]: Start difference. First operand 285 states and 875 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:59,253 INFO L93 Difference]: Finished difference Result 471 states and 1374 transitions. [2021-06-05 21:57:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:59,254 INFO L225 Difference]: With dead ends: 471 [2021-06-05 21:57:59,254 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 21:57:59,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 21:57:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 294. [2021-06-05 21:57:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.1296928327645053) internal successors, (917), 293 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 917 transitions. [2021-06-05 21:57:59,258 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 917 transitions. Word has length 18 [2021-06-05 21:57:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:59,258 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 917 transitions. [2021-06-05 21:57:59,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 917 transitions. [2021-06-05 21:57:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:59,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:59,258 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-06-05 21:57:59,258 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2025408914, now seen corresponding path program 45 times [2021-06-05 21:57:59,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229353023] [2021-06-05 21:57:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229353023] [2021-06-05 21:57:59,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229353023] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:59,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:59,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:59,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939420617] [2021-06-05 21:57:59,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:59,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:59,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:59,296 INFO L87 Difference]: Start difference. First operand 294 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:59,387 INFO L93 Difference]: Finished difference Result 540 states and 1577 transitions. [2021-06-05 21:57:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:59,388 INFO L225 Difference]: With dead ends: 540 [2021-06-05 21:57:59,388 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 21:57:59,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:57:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 21:57:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 299. [2021-06-05 21:57:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.161073825503356) internal successors, (942), 298 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 942 transitions. [2021-06-05 21:57:59,392 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 942 transitions. Word has length 18 [2021-06-05 21:57:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:59,392 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 942 transitions. [2021-06-05 21:57:59,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 942 transitions. [2021-06-05 21:57:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:59,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:59,392 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-06-05 21:57:59,392 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,393 INFO L82 PathProgramCache]: Analyzing trace with hash 775650660, now seen corresponding path program 46 times [2021-06-05 21:57:59,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864196820] [2021-06-05 21:57:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864196820] [2021-06-05 21:57:59,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864196820] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:59,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:59,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146392536] [2021-06-05 21:57:59,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:59,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:59,435 INFO L87 Difference]: Start difference. First operand 299 states and 942 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:59,532 INFO L93 Difference]: Finished difference Result 539 states and 1563 transitions. [2021-06-05 21:57:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:59,533 INFO L225 Difference]: With dead ends: 539 [2021-06-05 21:57:59,533 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 21:57:59,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 21:57:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 305. [2021-06-05 21:57:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1315789473684212) internal successors, (952), 304 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 952 transitions. [2021-06-05 21:57:59,537 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 952 transitions. Word has length 18 [2021-06-05 21:57:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:59,537 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 952 transitions. [2021-06-05 21:57:59,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 952 transitions. [2021-06-05 21:57:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:59,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:59,538 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-06-05 21:57:59,538 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash -665292174, now seen corresponding path program 56 times [2021-06-05 21:57:59,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724538391] [2021-06-05 21:57:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724538391] [2021-06-05 21:57:59,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724538391] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:59,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:59,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:59,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654291038] [2021-06-05 21:57:59,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:59,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:59,576 INFO L87 Difference]: Start difference. First operand 305 states and 952 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:59,687 INFO L93 Difference]: Finished difference Result 491 states and 1444 transitions. [2021-06-05 21:57:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:59,688 INFO L225 Difference]: With dead ends: 491 [2021-06-05 21:57:59,688 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 21:57:59,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 21:57:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 299. [2021-06-05 21:57:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-05 21:57:59,692 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-05 21:57:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:59,692 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-05 21:57:59,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-05 21:57:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:59,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:59,693 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-06-05 21:57:59,693 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,693 INFO L82 PathProgramCache]: Analyzing trace with hash -409990600, now seen corresponding path program 57 times [2021-06-05 21:57:59,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657600160] [2021-06-05 21:57:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657600160] [2021-06-05 21:57:59,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657600160] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:59,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:59,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:59,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360397582] [2021-06-05 21:57:59,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:59,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:59,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:59,727 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:59,845 INFO L93 Difference]: Finished difference Result 517 states and 1486 transitions. [2021-06-05 21:57:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:57:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:57:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:59,846 INFO L225 Difference]: With dead ends: 517 [2021-06-05 21:57:59,846 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 21:57:59,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:57:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 21:57:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 303. [2021-06-05 21:57:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1258278145695364) internal successors, (944), 302 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-06-05 21:57:59,850 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-06-05 21:57:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:59,850 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-06-05 21:57:59,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-06-05 21:57:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:57:59,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:59,851 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-06-05 21:57:59,851 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1957912224, now seen corresponding path program 58 times [2021-06-05 21:57:59,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941330440] [2021-06-05 21:57:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941330440] [2021-06-05 21:57:59,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941330440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:57:59,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:57:59,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:57:59,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037295330] [2021-06-05 21:57:59,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:57:59,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:57:59,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:57:59,886 INFO L87 Difference]: Start difference. First operand 303 states and 944 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:00,013 INFO L93 Difference]: Finished difference Result 492 states and 1450 transitions. [2021-06-05 21:58:00,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:00,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:00,014 INFO L225 Difference]: With dead ends: 492 [2021-06-05 21:58:00,014 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 21:58:00,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 21:58:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 299. [2021-06-05 21:58:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-05 21:58:00,018 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-05 21:58:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:00,018 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-05 21:58:00,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-05 21:58:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:00,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:00,019 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:00,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-06-05 21:58:00,019 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:00,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1274008476, now seen corresponding path program 47 times [2021-06-05 21:58:00,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:00,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318094595] [2021-06-05 21:58:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:00,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:00,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318094595] [2021-06-05 21:58:00,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318094595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:00,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726847144] [2021-06-05 21:58:00,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:00,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:58:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:00,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726847144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:00,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:00,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:58:00,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895370337] [2021-06-05 21:58:00,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:58:00,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:58:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:00,176 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:00,409 INFO L93 Difference]: Finished difference Result 604 states and 1726 transitions. [2021-06-05 21:58:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:58:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:00,410 INFO L225 Difference]: With dead ends: 604 [2021-06-05 21:58:00,410 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 21:58:00,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 21:58:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 302. [2021-06-05 21:58:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.13953488372093) internal successors, (945), 301 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 945 transitions. [2021-06-05 21:58:00,415 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 945 transitions. Word has length 18 [2021-06-05 21:58:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:00,415 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 945 transitions. [2021-06-05 21:58:00,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 945 transitions. [2021-06-05 21:58:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:00,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:00,415 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:00,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:00,621 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:00,621 INFO L82 PathProgramCache]: Analyzing trace with hash 18333924, now seen corresponding path program 48 times [2021-06-05 21:58:00,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:00,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326747320] [2021-06-05 21:58:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:00,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:00,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326747320] [2021-06-05 21:58:00,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326747320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:00,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277313662] [2021-06-05 21:58:00,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:00,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:58:00,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:00,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:58:00,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:00,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277313662] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:00,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:58:00,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:58:00,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429038066] [2021-06-05 21:58:00,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:00,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:00,781 INFO L87 Difference]: Start difference. First operand 302 states and 945 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:00,928 INFO L93 Difference]: Finished difference Result 560 states and 1629 transitions. [2021-06-05 21:58:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:00,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:00,929 INFO L225 Difference]: With dead ends: 560 [2021-06-05 21:58:00,929 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 21:58:00,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:58:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 21:58:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 299. [2021-06-05 21:58:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-05 21:58:00,933 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-05 21:58:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:00,933 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-05 21:58:00,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-05 21:58:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:00,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:00,933 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:01,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:01,134 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:01,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1253271948, now seen corresponding path program 49 times [2021-06-05 21:58:01,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:01,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624560777] [2021-06-05 21:58:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:01,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:01,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624560777] [2021-06-05 21:58:01,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624560777] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:01,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:01,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:01,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044832361] [2021-06-05 21:58:01,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:01,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:01,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:01,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:01,170 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:01,270 INFO L93 Difference]: Finished difference Result 578 states and 1648 transitions. [2021-06-05 21:58:01,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:01,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:01,271 INFO L225 Difference]: With dead ends: 578 [2021-06-05 21:58:01,271 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 21:58:01,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 21:58:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 303. [2021-06-05 21:58:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1258278145695364) internal successors, (944), 302 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-06-05 21:58:01,275 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-06-05 21:58:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:01,275 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-06-05 21:58:01,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-06-05 21:58:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:01,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:01,276 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:01,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-06-05 21:58:01,276 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1126271422, now seen corresponding path program 50 times [2021-06-05 21:58:01,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:01,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568557631] [2021-06-05 21:58:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:01,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:01,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568557631] [2021-06-05 21:58:01,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568557631] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:01,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:01,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:01,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129175664] [2021-06-05 21:58:01,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:01,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:01,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:01,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:01,317 INFO L87 Difference]: Start difference. First operand 303 states and 944 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:01,430 INFO L93 Difference]: Finished difference Result 436 states and 1296 transitions. [2021-06-05 21:58:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:58:01,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:01,431 INFO L225 Difference]: With dead ends: 436 [2021-06-05 21:58:01,431 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 21:58:01,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 21:58:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 301. [2021-06-05 21:58:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.13) internal successors, (939), 300 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 939 transitions. [2021-06-05 21:58:01,434 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 939 transitions. Word has length 18 [2021-06-05 21:58:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:01,435 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 939 transitions. [2021-06-05 21:58:01,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 939 transitions. [2021-06-05 21:58:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:01,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:01,435 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:01,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-06-05 21:58:01,435 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:01,435 INFO L82 PathProgramCache]: Analyzing trace with hash -757677600, now seen corresponding path program 59 times [2021-06-05 21:58:01,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:01,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467635229] [2021-06-05 21:58:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:01,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:01,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467635229] [2021-06-05 21:58:01,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467635229] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:01,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:01,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:01,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036135878] [2021-06-05 21:58:01,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:01,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:01,485 INFO L87 Difference]: Start difference. First operand 301 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:01,597 INFO L93 Difference]: Finished difference Result 565 states and 1643 transitions. [2021-06-05 21:58:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:01,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:01,598 INFO L225 Difference]: With dead ends: 565 [2021-06-05 21:58:01,598 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 21:58:01,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 21:58:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 304. [2021-06-05 21:58:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.1485148514851486) internal successors, (954), 303 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 954 transitions. [2021-06-05 21:58:01,602 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 954 transitions. Word has length 18 [2021-06-05 21:58:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:01,602 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 954 transitions. [2021-06-05 21:58:01,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 954 transitions. [2021-06-05 21:58:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:01,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:01,602 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:01,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-06-05 21:58:01,602 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash 866660168, now seen corresponding path program 60 times [2021-06-05 21:58:01,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:01,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004197763] [2021-06-05 21:58:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:01,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:01,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004197763] [2021-06-05 21:58:01,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004197763] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:01,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:01,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:01,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021451243] [2021-06-05 21:58:01,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:01,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:01,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:01,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:01,639 INFO L87 Difference]: Start difference. First operand 304 states and 954 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:01,765 INFO L93 Difference]: Finished difference Result 526 states and 1553 transitions. [2021-06-05 21:58:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:01,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:01,766 INFO L225 Difference]: With dead ends: 526 [2021-06-05 21:58:01,766 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 21:58:01,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 21:58:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 299. [2021-06-05 21:58:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.110738255033557) internal successors, (927), 298 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 927 transitions. [2021-06-05 21:58:01,770 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 927 transitions. Word has length 18 [2021-06-05 21:58:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:01,770 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 927 transitions. [2021-06-05 21:58:01,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 927 transitions. [2021-06-05 21:58:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:01,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:01,770 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:01,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-06-05 21:58:01,770 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1772548066, now seen corresponding path program 61 times [2021-06-05 21:58:01,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:01,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294895143] [2021-06-05 21:58:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:01,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:01,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294895143] [2021-06-05 21:58:01,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294895143] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:01,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:01,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:01,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073083734] [2021-06-05 21:58:01,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:01,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:01,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:01,801 INFO L87 Difference]: Start difference. First operand 299 states and 927 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:01,911 INFO L93 Difference]: Finished difference Result 429 states and 1270 transitions. [2021-06-05 21:58:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:01,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:01,912 INFO L225 Difference]: With dead ends: 429 [2021-06-05 21:58:01,912 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 21:58:01,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 21:58:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 305. [2021-06-05 21:58:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1184210526315788) internal successors, (948), 304 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 948 transitions. [2021-06-05 21:58:01,922 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 948 transitions. Word has length 18 [2021-06-05 21:58:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:01,922 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 948 transitions. [2021-06-05 21:58:01,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 948 transitions. [2021-06-05 21:58:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:01,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:01,923 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:01,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-06-05 21:58:01,923 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash -154516406, now seen corresponding path program 62 times [2021-06-05 21:58:01,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:01,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43816107] [2021-06-05 21:58:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:01,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:01,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43816107] [2021-06-05 21:58:01,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43816107] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:01,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:01,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:01,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075397351] [2021-06-05 21:58:01,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:01,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:01,964 INFO L87 Difference]: Start difference. First operand 305 states and 948 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:02,078 INFO L93 Difference]: Finished difference Result 428 states and 1275 transitions. [2021-06-05 21:58:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:02,079 INFO L225 Difference]: With dead ends: 428 [2021-06-05 21:58:02,079 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 21:58:02,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 21:58:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 301. [2021-06-05 21:58:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.1133333333333333) internal successors, (934), 300 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 934 transitions. [2021-06-05 21:58:02,083 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 934 transitions. Word has length 18 [2021-06-05 21:58:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:02,083 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 934 transitions. [2021-06-05 21:58:02,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,083 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 934 transitions. [2021-06-05 21:58:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:02,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:02,083 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:02,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-06-05 21:58:02,083 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1618310896, now seen corresponding path program 63 times [2021-06-05 21:58:02,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:02,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895654710] [2021-06-05 21:58:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:02,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895654710] [2021-06-05 21:58:02,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895654710] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:02,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:02,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:02,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791314476] [2021-06-05 21:58:02,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:02,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:02,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:02,116 INFO L87 Difference]: Start difference. First operand 301 states and 934 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:02,221 INFO L93 Difference]: Finished difference Result 444 states and 1322 transitions. [2021-06-05 21:58:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:02,222 INFO L225 Difference]: With dead ends: 444 [2021-06-05 21:58:02,222 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 21:58:02,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 21:58:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 299. [2021-06-05 21:58:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.11744966442953) internal successors, (929), 298 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 929 transitions. [2021-06-05 21:58:02,226 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 929 transitions. Word has length 18 [2021-06-05 21:58:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:02,226 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 929 transitions. [2021-06-05 21:58:02,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 929 transitions. [2021-06-05 21:58:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:02,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:02,226 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:02,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-06-05 21:58:02,226 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash 486044464, now seen corresponding path program 51 times [2021-06-05 21:58:02,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:02,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960369626] [2021-06-05 21:58:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:02,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960369626] [2021-06-05 21:58:02,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960369626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:02,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827876604] [2021-06-05 21:58:02,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:02,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:58:02,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:02,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:58:02,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827876604] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:02,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:58:02,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 21:58:02,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169609574] [2021-06-05 21:58:02,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:02,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:02,367 INFO L87 Difference]: Start difference. First operand 299 states and 929 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:02,486 INFO L93 Difference]: Finished difference Result 518 states and 1517 transitions. [2021-06-05 21:58:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:02,487 INFO L225 Difference]: With dead ends: 518 [2021-06-05 21:58:02,487 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 21:58:02,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:58:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 21:58:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 300. [2021-06-05 21:58:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.1137123745819397) internal successors, (931), 299 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 931 transitions. [2021-06-05 21:58:02,491 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 931 transitions. Word has length 18 [2021-06-05 21:58:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:02,491 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 931 transitions. [2021-06-05 21:58:02,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 931 transitions. [2021-06-05 21:58:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:02,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:02,491 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:02,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:02,692 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:02,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1778386864, now seen corresponding path program 52 times [2021-06-05 21:58:02,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:02,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406559896] [2021-06-05 21:58:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:02,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406559896] [2021-06-05 21:58:02,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406559896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:02,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166756828] [2021-06-05 21:58:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:02,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:02,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:58:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166756828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:02,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:02,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:58:02,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9500603] [2021-06-05 21:58:02,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:58:02,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:58:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:02,833 INFO L87 Difference]: Start difference. First operand 300 states and 931 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:03,010 INFO L93 Difference]: Finished difference Result 506 states and 1484 transitions. [2021-06-05 21:58:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:03,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:03,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:03,011 INFO L225 Difference]: With dead ends: 506 [2021-06-05 21:58:03,011 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 21:58:03,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:58:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 21:58:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 289. [2021-06-05 21:58:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1041666666666665) internal successors, (894), 288 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-06-05 21:58:03,015 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-06-05 21:58:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:03,015 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-06-05 21:58:03,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-06-05 21:58:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:03,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:03,016 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:03,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 21:58:03,216 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1819059010, now seen corresponding path program 53 times [2021-06-05 21:58:03,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:03,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184616166] [2021-06-05 21:58:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:03,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:03,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184616166] [2021-06-05 21:58:03,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184616166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:03,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145980494] [2021-06-05 21:58:03,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:03,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:03,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:58:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:03,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145980494] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:03,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:58:03,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 21:58:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572382437] [2021-06-05 21:58:03,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:03,363 INFO L87 Difference]: Start difference. First operand 289 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:03,495 INFO L93 Difference]: Finished difference Result 496 states and 1443 transitions. [2021-06-05 21:58:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:03,496 INFO L225 Difference]: With dead ends: 496 [2021-06-05 21:58:03,496 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 21:58:03,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:58:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 21:58:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 286. [2021-06-05 21:58:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.094736842105263) internal successors, (882), 285 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-06-05 21:58:03,501 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-06-05 21:58:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:03,501 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-06-05 21:58:03,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-06-05 21:58:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:03,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:03,501 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:03,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 21:58:03,705 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash -760676186, now seen corresponding path program 54 times [2021-06-05 21:58:03,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:03,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401728429] [2021-06-05 21:58:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:03,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:03,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401728429] [2021-06-05 21:58:03,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401728429] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:03,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:03,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:03,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886301315] [2021-06-05 21:58:03,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:03,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:03,737 INFO L87 Difference]: Start difference. First operand 286 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:03,821 INFO L93 Difference]: Finished difference Result 544 states and 1547 transitions. [2021-06-05 21:58:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:03,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:03,822 INFO L225 Difference]: With dead ends: 544 [2021-06-05 21:58:03,822 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 21:58:03,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 21:58:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 300. [2021-06-05 21:58:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.080267558528428) internal successors, (921), 299 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 921 transitions. [2021-06-05 21:58:03,826 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 921 transitions. Word has length 18 [2021-06-05 21:58:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:03,826 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 921 transitions. [2021-06-05 21:58:03,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 921 transitions. [2021-06-05 21:58:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:03,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:03,827 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:03,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-06-05 21:58:03,827 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1618867184, now seen corresponding path program 55 times [2021-06-05 21:58:03,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:03,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773087687] [2021-06-05 21:58:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:03,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773087687] [2021-06-05 21:58:03,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773087687] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:03,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:03,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:03,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442564016] [2021-06-05 21:58:03,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:03,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:03,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:03,868 INFO L87 Difference]: Start difference. First operand 300 states and 921 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,013 INFO L93 Difference]: Finished difference Result 465 states and 1345 transitions. [2021-06-05 21:58:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:58:04,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,014 INFO L225 Difference]: With dead ends: 465 [2021-06-05 21:58:04,014 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 21:58:04,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:58:04,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 21:58:04,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 298. [2021-06-05 21:58:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0841750841750843) internal successors, (916), 297 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 916 transitions. [2021-06-05 21:58:04,018 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 916 transitions. Word has length 18 [2021-06-05 21:58:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,018 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 916 transitions. [2021-06-05 21:58:04,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 916 transitions. [2021-06-05 21:58:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:04,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,018 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-06-05 21:58:04,018 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,018 INFO L82 PathProgramCache]: Analyzing trace with hash 290169764, now seen corresponding path program 56 times [2021-06-05 21:58:04,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243839901] [2021-06-05 21:58:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243839901] [2021-06-05 21:58:04,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243839901] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:04,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:04,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924187467] [2021-06-05 21:58:04,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:04,053 INFO L87 Difference]: Start difference. First operand 298 states and 916 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,152 INFO L93 Difference]: Finished difference Result 486 states and 1387 transitions. [2021-06-05 21:58:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:58:04,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,153 INFO L225 Difference]: With dead ends: 486 [2021-06-05 21:58:04,153 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 21:58:04,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 21:58:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 286. [2021-06-05 21:58:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.094736842105263) internal successors, (882), 285 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-06-05 21:58:04,156 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-06-05 21:58:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,157 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-06-05 21:58:04,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-06-05 21:58:04,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:04,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,157 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-06-05 21:58:04,157 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,157 INFO L82 PathProgramCache]: Analyzing trace with hash -687567564, now seen corresponding path program 64 times [2021-06-05 21:58:04,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26033723] [2021-06-05 21:58:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26033723] [2021-06-05 21:58:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26033723] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:04,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:04,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:04,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681131282] [2021-06-05 21:58:04,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:04,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:04,192 INFO L87 Difference]: Start difference. First operand 286 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,295 INFO L93 Difference]: Finished difference Result 514 states and 1519 transitions. [2021-06-05 21:58:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,296 INFO L225 Difference]: With dead ends: 514 [2021-06-05 21:58:04,296 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 21:58:04,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 21:58:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 292. [2021-06-05 21:58:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1237113402061856) internal successors, (909), 291 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 909 transitions. [2021-06-05 21:58:04,300 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 909 transitions. Word has length 18 [2021-06-05 21:58:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,300 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 909 transitions. [2021-06-05 21:58:04,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 909 transitions. [2021-06-05 21:58:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:04,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,301 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-06-05 21:58:04,301 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash 936770204, now seen corresponding path program 65 times [2021-06-05 21:58:04,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725905624] [2021-06-05 21:58:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725905624] [2021-06-05 21:58:04,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725905624] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:04,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:04,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:04,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46593680] [2021-06-05 21:58:04,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:04,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:04,341 INFO L87 Difference]: Start difference. First operand 292 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,474 INFO L93 Difference]: Finished difference Result 517 states and 1525 transitions. [2021-06-05 21:58:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,475 INFO L225 Difference]: With dead ends: 517 [2021-06-05 21:58:04,475 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 21:58:04,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 21:58:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 289. [2021-06-05 21:58:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1041666666666665) internal successors, (894), 288 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-06-05 21:58:04,479 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-06-05 21:58:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,479 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-06-05 21:58:04,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-06-05 21:58:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:04,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,480 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-06-05 21:58:04,480 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1977006002, now seen corresponding path program 66 times [2021-06-05 21:58:04,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359098872] [2021-06-05 21:58:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359098872] [2021-06-05 21:58:04,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359098872] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:04,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:04,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:04,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398798858] [2021-06-05 21:58:04,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:04,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:04,511 INFO L87 Difference]: Start difference. First operand 289 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,618 INFO L93 Difference]: Finished difference Result 508 states and 1493 transitions. [2021-06-05 21:58:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:04,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,618 INFO L225 Difference]: With dead ends: 508 [2021-06-05 21:58:04,618 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 21:58:04,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:58:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 21:58:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 285. [2021-06-05 21:58:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-06-05 21:58:04,622 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-06-05 21:58:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,622 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-06-05 21:58:04,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-06-05 21:58:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:04,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,623 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-06-05 21:58:04,623 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1821454276, now seen corresponding path program 57 times [2021-06-05 21:58:04,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711351588] [2021-06-05 21:58:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711351588] [2021-06-05 21:58:04,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711351588] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:04,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:04,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512496722] [2021-06-05 21:58:04,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:04,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:04,657 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,722 INFO L93 Difference]: Finished difference Result 435 states and 1231 transitions. [2021-06-05 21:58:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:04,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,723 INFO L225 Difference]: With dead ends: 435 [2021-06-05 21:58:04,723 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 21:58:04,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 21:58:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 297. [2021-06-05 21:58:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.0777027027027026) internal successors, (911), 296 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 911 transitions. [2021-06-05 21:58:04,727 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 911 transitions. Word has length 18 [2021-06-05 21:58:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,727 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 911 transitions. [2021-06-05 21:58:04,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 911 transitions. [2021-06-05 21:58:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:04,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,727 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-06-05 21:58:04,727 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,728 INFO L82 PathProgramCache]: Analyzing trace with hash 558089094, now seen corresponding path program 58 times [2021-06-05 21:58:04,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110554729] [2021-06-05 21:58:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110554729] [2021-06-05 21:58:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110554729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:04,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:04,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:04,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323357129] [2021-06-05 21:58:04,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:04,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:04,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:04,767 INFO L87 Difference]: Start difference. First operand 297 states and 911 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,844 INFO L93 Difference]: Finished difference Result 379 states and 1118 transitions. [2021-06-05 21:58:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,846 INFO L225 Difference]: With dead ends: 379 [2021-06-05 21:58:04,846 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 21:58:04,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 21:58:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 295. [2021-06-05 21:58:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0816326530612246) internal successors, (906), 294 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 906 transitions. [2021-06-05 21:58:04,850 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 906 transitions. Word has length 18 [2021-06-05 21:58:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,850 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 906 transitions. [2021-06-05 21:58:04,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 906 transitions. [2021-06-05 21:58:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:04,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,850 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-06-05 21:58:04,850 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash -770608326, now seen corresponding path program 59 times [2021-06-05 21:58:04,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082020425] [2021-06-05 21:58:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082020425] [2021-06-05 21:58:04,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082020425] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:04,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:04,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:04,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975869553] [2021-06-05 21:58:04,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:04,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:04,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:04,877 INFO L87 Difference]: Start difference. First operand 295 states and 906 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,946 INFO L93 Difference]: Finished difference Result 404 states and 1172 transitions. [2021-06-05 21:58:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:04,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:04,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,947 INFO L225 Difference]: With dead ends: 404 [2021-06-05 21:58:04,947 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 21:58:04,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 21:58:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 283. [2021-06-05 21:58:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.0921985815602837) internal successors, (872), 282 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 872 transitions. [2021-06-05 21:58:04,951 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 872 transitions. Word has length 18 [2021-06-05 21:58:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,951 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 872 transitions. [2021-06-05 21:58:04,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 872 transitions. [2021-06-05 21:58:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:04,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,951 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-06-05 21:58:04,951 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1443851738, now seen corresponding path program 67 times [2021-06-05 21:58:04,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11079676] [2021-06-05 21:58:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11079676] [2021-06-05 21:58:04,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11079676] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:04,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:04,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853714876] [2021-06-05 21:58:04,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:04,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:04,978 INFO L87 Difference]: Start difference. First operand 283 states and 872 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,069 INFO L93 Difference]: Finished difference Result 443 states and 1306 transitions. [2021-06-05 21:58:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,070 INFO L225 Difference]: With dead ends: 443 [2021-06-05 21:58:05,070 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 21:58:05,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 21:58:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 282. [2021-06-05 21:58:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.088967971530249) internal successors, (868), 281 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 868 transitions. [2021-06-05 21:58:05,074 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 868 transitions. Word has length 18 [2021-06-05 21:58:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,074 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 868 transitions. [2021-06-05 21:58:05,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 868 transitions. [2021-06-05 21:58:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:05,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,074 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:05,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-06-05 21:58:05,074 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:05,075 INFO L82 PathProgramCache]: Analyzing trace with hash -270558368, now seen corresponding path program 68 times [2021-06-05 21:58:05,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:05,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56975091] [2021-06-05 21:58:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:05,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56975091] [2021-06-05 21:58:05,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56975091] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:05,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:05,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:05,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198658415] [2021-06-05 21:58:05,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:05,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:05,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:05,106 INFO L87 Difference]: Start difference. First operand 282 states and 868 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,203 INFO L93 Difference]: Finished difference Result 485 states and 1413 transitions. [2021-06-05 21:58:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:05,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,203 INFO L225 Difference]: With dead ends: 485 [2021-06-05 21:58:05,204 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 21:58:05,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 21:58:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 285. [2021-06-05 21:58:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.109154929577465) internal successors, (883), 284 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 883 transitions. [2021-06-05 21:58:05,207 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 883 transitions. Word has length 18 [2021-06-05 21:58:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,207 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 883 transitions. [2021-06-05 21:58:05,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 883 transitions. [2021-06-05 21:58:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:05,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,208 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:05,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-06-05 21:58:05,208 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1353779400, now seen corresponding path program 69 times [2021-06-05 21:58:05,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:05,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591935397] [2021-06-05 21:58:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:05,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591935397] [2021-06-05 21:58:05,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591935397] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:05,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:05,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:05,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368062774] [2021-06-05 21:58:05,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:05,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:05,238 INFO L87 Difference]: Start difference. First operand 285 states and 883 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,323 INFO L93 Difference]: Finished difference Result 443 states and 1318 transitions. [2021-06-05 21:58:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,324 INFO L225 Difference]: With dead ends: 443 [2021-06-05 21:58:05,324 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 21:58:05,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 21:58:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 279. [2021-06-05 21:58:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.079136690647482) internal successors, (856), 278 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 856 transitions. [2021-06-05 21:58:05,327 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 856 transitions. Word has length 18 [2021-06-05 21:58:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,327 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 856 transitions. [2021-06-05 21:58:05,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 856 transitions. [2021-06-05 21:58:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:05,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,328 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:05,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-06-05 21:58:05,328 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1960501272, now seen corresponding path program 70 times [2021-06-05 21:58:05,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:05,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116615712] [2021-06-05 21:58:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:05,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116615712] [2021-06-05 21:58:05,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116615712] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:05,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:05,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:05,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228243003] [2021-06-05 21:58:05,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:05,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:05,358 INFO L87 Difference]: Start difference. First operand 279 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,444 INFO L93 Difference]: Finished difference Result 463 states and 1339 transitions. [2021-06-05 21:58:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,445 INFO L225 Difference]: With dead ends: 463 [2021-06-05 21:58:05,445 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 21:58:05,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 21:58:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 280. [2021-06-05 21:58:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.075268817204301) internal successors, (858), 279 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 858 transitions. [2021-06-05 21:58:05,448 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 858 transitions. Word has length 18 [2021-06-05 21:58:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,449 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 858 transitions. [2021-06-05 21:58:05,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 858 transitions. [2021-06-05 21:58:05,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:05,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,449 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:05,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-06-05 21:58:05,449 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash -336163504, now seen corresponding path program 71 times [2021-06-05 21:58:05,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:05,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683712442] [2021-06-05 21:58:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:05,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683712442] [2021-06-05 21:58:05,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683712442] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:05,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:05,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:05,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212817251] [2021-06-05 21:58:05,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:05,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:05,481 INFO L87 Difference]: Start difference. First operand 280 states and 858 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,575 INFO L93 Difference]: Finished difference Result 466 states and 1345 transitions. [2021-06-05 21:58:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:05,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,576 INFO L225 Difference]: With dead ends: 466 [2021-06-05 21:58:05,576 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 21:58:05,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 21:58:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 277. [2021-06-05 21:58:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0543478260869565) internal successors, (843), 276 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 843 transitions. [2021-06-05 21:58:05,580 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 843 transitions. Word has length 18 [2021-06-05 21:58:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,580 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 843 transitions. [2021-06-05 21:58:05,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 843 transitions. [2021-06-05 21:58:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:58:05,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,581 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:05,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-06-05 21:58:05,581 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 704072294, now seen corresponding path program 72 times [2021-06-05 21:58:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:05,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358084423] [2021-06-05 21:58:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:05,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358084423] [2021-06-05 21:58:05,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358084423] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:58:05,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:58:05,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 21:58:05,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183821988] [2021-06-05 21:58:05,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:58:05,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:58:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:58:05,608 INFO L87 Difference]: Start difference. First operand 277 states and 843 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,695 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-06-05 21:58:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:58:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:58:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,696 INFO L225 Difference]: With dead ends: 415 [2021-06-05 21:58:05,696 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 21:58:05,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:58:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 21:58:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 263. [2021-06-05 21:58:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.053435114503817) internal successors, (800), 262 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 800 transitions. [2021-06-05 21:58:05,699 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 800 transitions. Word has length 18 [2021-06-05 21:58:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,699 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 800 transitions. [2021-06-05 21:58:05,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 800 transitions. [2021-06-05 21:58:05,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:05,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,700 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:05,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-06-05 21:58:05,700 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1233480971, now seen corresponding path program 1 times [2021-06-05 21:58:05,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:05,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457329187] [2021-06-05 21:58:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:05,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:05,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457329187] [2021-06-05 21:58:05,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457329187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:05,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218871843] [2021-06-05 21:58:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:58:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:58:05,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218871843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:05,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:05,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:58:05,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267475916] [2021-06-05 21:58:05,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:58:05,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:58:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:58:05,836 INFO L87 Difference]: Start difference. First operand 263 states and 800 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,894 INFO L93 Difference]: Finished difference Result 474 states and 1387 transitions. [2021-06-05 21:58:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:58:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,895 INFO L225 Difference]: With dead ends: 474 [2021-06-05 21:58:05,895 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 21:58:05,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:58:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 21:58:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 307. [2021-06-05 21:58:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0718954248366015) internal successors, (940), 306 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 940 transitions. [2021-06-05 21:58:05,898 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 940 transitions. Word has length 19 [2021-06-05 21:58:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,898 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 940 transitions. [2021-06-05 21:58:05,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 940 transitions. [2021-06-05 21:58:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:05,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,899 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:06,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 21:58:06,099 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:06,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1443659084, now seen corresponding path program 1 times [2021-06-05 21:58:06,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:06,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175996822] [2021-06-05 21:58:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:06,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175996822] [2021-06-05 21:58:06,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175996822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:06,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503834194] [2021-06-05 21:58:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:06,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:06,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:06,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:06,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:06,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:06,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:06,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:06,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 21:58:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:06,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503834194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:06,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:06,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:06,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524495863] [2021-06-05 21:58:06,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:06,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:06,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:06,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:06,528 INFO L87 Difference]: Start difference. First operand 307 states and 940 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:07,033 INFO L93 Difference]: Finished difference Result 475 states and 1332 transitions. [2021-06-05 21:58:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:58:07,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:07,034 INFO L225 Difference]: With dead ends: 475 [2021-06-05 21:58:07,034 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 21:58:07,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 567.3ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 21:58:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 317. [2021-06-05 21:58:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0569620253164556) internal successors, (966), 316 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 966 transitions. [2021-06-05 21:58:07,038 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 966 transitions. Word has length 19 [2021-06-05 21:58:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:07,038 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 966 transitions. [2021-06-05 21:58:07,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 966 transitions. [2021-06-05 21:58:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:07,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:07,039 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:07,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:07,239 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:07,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:07,239 INFO L82 PathProgramCache]: Analyzing trace with hash -979539610, now seen corresponding path program 2 times [2021-06-05 21:58:07,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:07,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473662713] [2021-06-05 21:58:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:07,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:07,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473662713] [2021-06-05 21:58:07,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473662713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:07,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358351472] [2021-06-05 21:58:07,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:07,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:07,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:07,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:07,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:07,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:07,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:07,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:07,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:07,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:07,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:07,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:07,676 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 21:58:07,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:07,677 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 21:58:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:07,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358351472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:07,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:07,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:07,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893508702] [2021-06-05 21:58:07,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:07,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:07,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:07,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:07,734 INFO L87 Difference]: Start difference. First operand 317 states and 966 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:08,493 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 21:58:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:08,783 INFO L93 Difference]: Finished difference Result 483 states and 1370 transitions. [2021-06-05 21:58:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:08,784 INFO L225 Difference]: With dead ends: 483 [2021-06-05 21:58:08,784 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 21:58:08,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1112.2ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 21:58:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 320. [2021-06-05 21:58:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.053291536050157) internal successors, (974), 319 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 974 transitions. [2021-06-05 21:58:08,788 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 974 transitions. Word has length 19 [2021-06-05 21:58:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:08,788 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 974 transitions. [2021-06-05 21:58:08,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 974 transitions. [2021-06-05 21:58:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:08,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:08,789 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:08,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:09,000 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:09,000 INFO L82 PathProgramCache]: Analyzing trace with hash 114551978, now seen corresponding path program 3 times [2021-06-05 21:58:09,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:09,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123141463] [2021-06-05 21:58:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:09,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123141463] [2021-06-05 21:58:09,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123141463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897246732] [2021-06-05 21:58:09,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:09,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:58:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:09,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:09,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:09,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:09,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:09,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:09,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:09,362 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,398 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 21:58:09,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:09,399 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-05 21:58:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:09,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897246732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:09,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:09,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:09,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056205916] [2021-06-05 21:58:09,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:09,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:09,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:09,474 INFO L87 Difference]: Start difference. First operand 320 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:10,029 INFO L93 Difference]: Finished difference Result 442 states and 1271 transitions. [2021-06-05 21:58:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:10,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:10,030 INFO L225 Difference]: With dead ends: 442 [2021-06-05 21:58:10,030 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 21:58:10,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 21:58:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 326. [2021-06-05 21:58:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.046153846153846) internal successors, (990), 325 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 990 transitions. [2021-06-05 21:58:10,033 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 990 transitions. Word has length 19 [2021-06-05 21:58:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:10,033 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 990 transitions. [2021-06-05 21:58:10,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 990 transitions. [2021-06-05 21:58:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:10,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:10,034 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:10,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:10,249 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:10,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1325886340, now seen corresponding path program 4 times [2021-06-05 21:58:10,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:10,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583539760] [2021-06-05 21:58:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:10,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:10,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583539760] [2021-06-05 21:58:10,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583539760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:10,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890449612] [2021-06-05 21:58:10,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:10,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:10,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:10,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:10,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:10,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:10,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:10,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:10,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:10,564 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:10,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:10,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:10,575 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:10,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:10,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:10,585 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:10,589 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,662 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-05 21:58:10,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:10,663 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 21:58:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:10,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890449612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:10,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:10,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:10,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000738180] [2021-06-05 21:58:10,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:10,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:10,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:10,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:10,786 INFO L87 Difference]: Start difference. First operand 326 states and 990 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:11,419 INFO L93 Difference]: Finished difference Result 466 states and 1319 transitions. [2021-06-05 21:58:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:11,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:11,420 INFO L225 Difference]: With dead ends: 466 [2021-06-05 21:58:11,420 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 21:58:11,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 21:58:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 329. [2021-06-05 21:58:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.042682926829268) internal successors, (998), 328 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 998 transitions. [2021-06-05 21:58:11,423 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 998 transitions. Word has length 19 [2021-06-05 21:58:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:11,423 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 998 transitions. [2021-06-05 21:58:11,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 998 transitions. [2021-06-05 21:58:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:11,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:11,424 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:11,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 21:58:11,637 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:11,637 INFO L82 PathProgramCache]: Analyzing trace with hash 822910196, now seen corresponding path program 5 times [2021-06-05 21:58:11,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:11,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900720464] [2021-06-05 21:58:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:11,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:11,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900720464] [2021-06-05 21:58:11,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900720464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:11,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964849299] [2021-06-05 21:58:11,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:11,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:11,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:11,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:11,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:11,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:11,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:11,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:11,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:11,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:11,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:11,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:11,929 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:11,932 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:11,936 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:11,939 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:11,943 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,997 INFO L628 ElimStorePlain]: treesize reduction 31, result has 65.6 percent of original size [2021-06-05 21:58:11,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:11,998 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:430, output treesize:59 [2021-06-05 21:58:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:12,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964849299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:12,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:12,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 21:58:12,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197805378] [2021-06-05 21:58:12,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:58:12,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:12,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:58:12,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:58:12,106 INFO L87 Difference]: Start difference. First operand 329 states and 998 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:12,728 INFO L93 Difference]: Finished difference Result 507 states and 1422 transitions. [2021-06-05 21:58:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:58:12,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:12,729 INFO L225 Difference]: With dead ends: 507 [2021-06-05 21:58:12,729 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 21:58:12,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 21:58:12,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 344. [2021-06-05 21:58:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.043731778425656) internal successors, (1044), 343 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1044 transitions. [2021-06-05 21:58:12,733 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1044 transitions. Word has length 19 [2021-06-05 21:58:12,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:12,733 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1044 transitions. [2021-06-05 21:58:12,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1044 transitions. [2021-06-05 21:58:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:12,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:12,733 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:12,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 21:58:12,934 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:12,934 INFO L82 PathProgramCache]: Analyzing trace with hash -771246302, now seen corresponding path program 6 times [2021-06-05 21:58:12,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:12,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331367979] [2021-06-05 21:58:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:13,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:13,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331367979] [2021-06-05 21:58:13,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331367979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:13,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192974706] [2021-06-05 21:58:13,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:13,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:58:13,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:13,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:13,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:13,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:13,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:13,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:13,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:13,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:13,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:13,291 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 21:58:13,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:13,292 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 21:58:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:13,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192974706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:13,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:13,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:13,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580093639] [2021-06-05 21:58:13,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:13,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:13,347 INFO L87 Difference]: Start difference. First operand 344 states and 1044 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:13,771 INFO L93 Difference]: Finished difference Result 480 states and 1384 transitions. [2021-06-05 21:58:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:58:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:13,772 INFO L225 Difference]: With dead ends: 480 [2021-06-05 21:58:13,772 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 21:58:13,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 21:58:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 360. [2021-06-05 21:58:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0250696378830084) internal successors, (1086), 359 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1086 transitions. [2021-06-05 21:58:13,776 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1086 transitions. Word has length 19 [2021-06-05 21:58:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:13,776 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1086 transitions. [2021-06-05 21:58:13,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1086 transitions. [2021-06-05 21:58:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:13,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:13,776 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:13,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:13,977 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2083282676, now seen corresponding path program 7 times [2021-06-05 21:58:13,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:13,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44802842] [2021-06-05 21:58:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:14,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:14,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44802842] [2021-06-05 21:58:14,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44802842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:14,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470902859] [2021-06-05 21:58:14,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:14,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:14,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:14,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:14,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:14,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:14,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:14,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:14,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:14,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:14,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:14,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:14,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:14,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:14,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:14,350 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-05 21:58:14,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:14,351 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:266, output treesize:67 [2021-06-05 21:58:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:14,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470902859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:14,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:14,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:14,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133167993] [2021-06-05 21:58:14,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:14,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:14,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:14,472 INFO L87 Difference]: Start difference. First operand 360 states and 1086 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:15,066 INFO L93 Difference]: Finished difference Result 535 states and 1491 transitions. [2021-06-05 21:58:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:58:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:15,067 INFO L225 Difference]: With dead ends: 535 [2021-06-05 21:58:15,067 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 21:58:15,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 674.9ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:15,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 21:58:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 369. [2021-06-05 21:58:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0407608695652173) internal successors, (1119), 368 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1119 transitions. [2021-06-05 21:58:15,071 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1119 transitions. Word has length 19 [2021-06-05 21:58:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:15,071 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1119 transitions. [2021-06-05 21:58:15,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1119 transitions. [2021-06-05 21:58:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:15,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:15,071 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:15,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 21:58:15,272 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash -62888084, now seen corresponding path program 8 times [2021-06-05 21:58:15,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:15,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719961895] [2021-06-05 21:58:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:15,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:15,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719961895] [2021-06-05 21:58:15,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719961895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:15,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301615115] [2021-06-05 21:58:15,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:15,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:15,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:15,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:15,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:15,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:15,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:15,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:15,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:15,592 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:15,595 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:15,598 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:15,604 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:15,608 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:15,611 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,666 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:58:15,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:15,667 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:58:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:15,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301615115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:15,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:15,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:15,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876996438] [2021-06-05 21:58:15,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:15,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:15,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:15,766 INFO L87 Difference]: Start difference. First operand 369 states and 1119 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:16,371 INFO L93 Difference]: Finished difference Result 548 states and 1558 transitions. [2021-06-05 21:58:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:16,372 INFO L225 Difference]: With dead ends: 548 [2021-06-05 21:58:16,372 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 21:58:16,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 21:58:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 378. [2021-06-05 21:58:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.0716180371352784) internal successors, (1158), 377 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1158 transitions. [2021-06-05 21:58:16,376 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1158 transitions. Word has length 19 [2021-06-05 21:58:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:16,376 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1158 transitions. [2021-06-05 21:58:16,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1158 transitions. [2021-06-05 21:58:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:16,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:16,377 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:16,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:16,577 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:16,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1075580616, now seen corresponding path program 9 times [2021-06-05 21:58:16,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:16,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137553233] [2021-06-05 21:58:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:16,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:16,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137553233] [2021-06-05 21:58:16,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137553233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:16,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555819988] [2021-06-05 21:58:16,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:16,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:58:16,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:16,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:16,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:16,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:17,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:17,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:17,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:17,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:17,015 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:17,018 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:17,021 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:17,024 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:17,027 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,075 INFO L628 ElimStorePlain]: treesize reduction 32, result has 65.6 percent of original size [2021-06-05 21:58:17,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:17,076 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:358, output treesize:61 [2021-06-05 21:58:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:17,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555819988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:17,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:17,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:17,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915096812] [2021-06-05 21:58:17,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:17,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:17,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:17,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:17,168 INFO L87 Difference]: Start difference. First operand 378 states and 1158 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:17,748 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-06-05 21:58:17,869 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-06-05 21:58:18,120 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 21:58:18,237 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-05 21:58:18,365 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-05 21:58:18,517 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 21:58:18,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:18,758 INFO L93 Difference]: Finished difference Result 630 states and 1766 transitions. [2021-06-05 21:58:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:58:18,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:18,760 INFO L225 Difference]: With dead ends: 630 [2021-06-05 21:58:18,760 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 21:58:18,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1712.6ms TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:58:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 21:58:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 387. [2021-06-05 21:58:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.062176165803109) internal successors, (1182), 386 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1182 transitions. [2021-06-05 21:58:18,764 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1182 transitions. Word has length 19 [2021-06-05 21:58:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:18,764 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1182 transitions. [2021-06-05 21:58:18,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1182 transitions. [2021-06-05 21:58:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:18,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:18,765 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:18,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 21:58:18,966 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash -304728262, now seen corresponding path program 10 times [2021-06-05 21:58:18,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:18,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590160412] [2021-06-05 21:58:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:19,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:19,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590160412] [2021-06-05 21:58:19,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590160412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:19,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274057851] [2021-06-05 21:58:19,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:19,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:19,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:19,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:19,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:19,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:19,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:19,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:19,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:19,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:19,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 21:58:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:19,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274057851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:19,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:19,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:19,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141471988] [2021-06-05 21:58:19,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:19,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:19,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:19,370 INFO L87 Difference]: Start difference. First operand 387 states and 1182 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:20,010 INFO L93 Difference]: Finished difference Result 656 states and 1844 transitions. [2021-06-05 21:58:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:20,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:20,011 INFO L225 Difference]: With dead ends: 656 [2021-06-05 21:58:20,011 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 21:58:20,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 708.1ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 21:58:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 399. [2021-06-05 21:58:20,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0603015075376883) internal successors, (1218), 398 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1218 transitions. [2021-06-05 21:58:20,016 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1218 transitions. Word has length 19 [2021-06-05 21:58:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:20,016 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1218 transitions. [2021-06-05 21:58:20,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1218 transitions. [2021-06-05 21:58:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:20,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:20,017 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:20,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 21:58:20,217 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:20,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:20,217 INFO L82 PathProgramCache]: Analyzing trace with hash 159391212, now seen corresponding path program 11 times [2021-06-05 21:58:20,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:20,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293524581] [2021-06-05 21:58:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:20,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:20,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293524581] [2021-06-05 21:58:20,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293524581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:20,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603709373] [2021-06-05 21:58:20,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:20,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:20,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:20,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:20,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:20,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:20,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:20,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:20,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:20,592 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,624 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 21:58:20,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:20,625 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:43 [2021-06-05 21:58:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:20,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603709373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:20,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:20,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:20,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721889125] [2021-06-05 21:58:20,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:20,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:20,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:20,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:20,688 INFO L87 Difference]: Start difference. First operand 399 states and 1218 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:21,527 INFO L93 Difference]: Finished difference Result 657 states and 1867 transitions. [2021-06-05 21:58:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:21,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:21,528 INFO L225 Difference]: With dead ends: 657 [2021-06-05 21:58:21,528 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 21:58:21,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 891.6ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:58:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 21:58:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 402. [2021-06-05 21:58:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.064837905236908) internal successors, (1229), 401 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1229 transitions. [2021-06-05 21:58:21,533 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1229 transitions. Word has length 19 [2021-06-05 21:58:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:21,533 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1229 transitions. [2021-06-05 21:58:21,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1229 transitions. [2021-06-05 21:58:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:21,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:21,534 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:21,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 21:58:21,741 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:21,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1253482800, now seen corresponding path program 12 times [2021-06-05 21:58:21,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:21,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866364948] [2021-06-05 21:58:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:21,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866364948] [2021-06-05 21:58:21,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866364948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529902176] [2021-06-05 21:58:21,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:21,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:58:21,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:21,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:21,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:22,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:22,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:22,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:22,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:22,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:22,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:22,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:22,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:22,105 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 21:58:22,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:22,106 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 21:58:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529902176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:22,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:22,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:22,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733142408] [2021-06-05 21:58:22,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:22,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:22,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:22,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:22,170 INFO L87 Difference]: Start difference. First operand 402 states and 1229 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:22,767 INFO L93 Difference]: Finished difference Result 662 states and 1878 transitions. [2021-06-05 21:58:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:22,768 INFO L225 Difference]: With dead ends: 662 [2021-06-05 21:58:22,769 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 21:58:22,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 631.6ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 21:58:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 408. [2021-06-05 21:58:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-05 21:58:22,773 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-05 21:58:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:22,773 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-05 21:58:22,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-05 21:58:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:22,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:22,774 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:22,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 21:58:22,975 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -186955518, now seen corresponding path program 13 times [2021-06-05 21:58:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:22,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410533791] [2021-06-05 21:58:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:23,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:23,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410533791] [2021-06-05 21:58:23,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410533791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:23,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602019128] [2021-06-05 21:58:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:23,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:23,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:23,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:23,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:23,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:23,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:23,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:23,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:23,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:23,330 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:23,332 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,387 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-05 21:58:23,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:23,388 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 21:58:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:23,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602019128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:23,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:23,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:23,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088928768] [2021-06-05 21:58:23,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:23,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:23,485 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:24,543 INFO L93 Difference]: Finished difference Result 724 states and 2000 transitions. [2021-06-05 21:58:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:58:24,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:24,544 INFO L225 Difference]: With dead ends: 724 [2021-06-05 21:58:24,544 INFO L226 Difference]: Without dead ends: 674 [2021-06-05 21:58:24,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1078.4ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:58:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-05 21:58:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 408. [2021-06-05 21:58:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-05 21:58:24,549 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-05 21:58:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:24,549 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-05 21:58:24,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-05 21:58:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:24,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:24,550 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:24,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:24,750 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1961841018, now seen corresponding path program 14 times [2021-06-05 21:58:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:24,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96272108] [2021-06-05 21:58:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:24,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:24,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96272108] [2021-06-05 21:58:24,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96272108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:24,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638085815] [2021-06-05 21:58:24,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:24,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:24,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:24,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:24,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:25,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:25,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:25,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:25,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:25,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:25,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:25,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,113 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 21:58:25,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:25,114 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:202, output treesize:61 [2021-06-05 21:58:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:25,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638085815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:25,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:25,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:58:25,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135821177] [2021-06-05 21:58:25,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:25,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:25,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:25,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:25,215 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:25,788 INFO L93 Difference]: Finished difference Result 616 states and 1773 transitions. [2021-06-05 21:58:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:25,789 INFO L225 Difference]: With dead ends: 616 [2021-06-05 21:58:25,789 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 21:58:25,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 21:58:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 408. [2021-06-05 21:58:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-05 21:58:25,794 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-05 21:58:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:25,794 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-05 21:58:25,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-05 21:58:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:25,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:25,795 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:25,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-05 21:58:25,995 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:25,995 INFO L82 PathProgramCache]: Analyzing trace with hash 236586928, now seen corresponding path program 15 times [2021-06-05 21:58:25,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:25,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053870651] [2021-06-05 21:58:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:26,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:26,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053870651] [2021-06-05 21:58:26,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053870651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:26,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118360238] [2021-06-05 21:58:26,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:26,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:58:26,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:26,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:26,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:26,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:26,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:26,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:26,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:26,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:26,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:26,379 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,412 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 21:58:26,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:26,412 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 21:58:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:26,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118360238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:26,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:26,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:26,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724332852] [2021-06-05 21:58:26,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:26,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:26,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:26,468 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:27,069 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-06-05 21:58:27,368 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-06-05 21:58:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:27,602 INFO L93 Difference]: Finished difference Result 772 states and 2161 transitions. [2021-06-05 21:58:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:58:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:27,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:27,603 INFO L225 Difference]: With dead ends: 772 [2021-06-05 21:58:27,603 INFO L226 Difference]: Without dead ends: 710 [2021-06-05 21:58:27,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1156.4ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:58:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-05 21:58:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 425. [2021-06-05 21:58:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.0542452830188678) internal successors, (1295), 424 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1295 transitions. [2021-06-05 21:58:27,609 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1295 transitions. Word has length 19 [2021-06-05 21:58:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:27,609 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1295 transitions. [2021-06-05 21:58:27,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1295 transitions. [2021-06-05 21:58:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:27,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:27,610 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:27,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 21:58:27,817 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:27,817 INFO L82 PathProgramCache]: Analyzing trace with hash -678427472, now seen corresponding path program 16 times [2021-06-05 21:58:27,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:27,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804874247] [2021-06-05 21:58:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:27,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:27,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804874247] [2021-06-05 21:58:27,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804874247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:27,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809068855] [2021-06-05 21:58:27,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:27,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:27,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:27,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:27,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:28,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:28,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:28,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:28,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:28,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:28,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:28,192 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 21:58:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:28,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809068855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:28,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:28,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:28,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487248947] [2021-06-05 21:58:28,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:28,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:28,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:28,243 INFO L87 Difference]: Start difference. First operand 425 states and 1295 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:28,483 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 21:58:28,671 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 21:58:28,863 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 21:58:29,011 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-06-05 21:58:29,213 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 21:58:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:29,225 INFO L93 Difference]: Finished difference Result 640 states and 1840 transitions. [2021-06-05 21:58:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:58:29,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:29,226 INFO L225 Difference]: With dead ends: 640 [2021-06-05 21:58:29,226 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 21:58:29,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1091.7ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 21:58:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 427. [2021-06-05 21:58:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.056338028169014) internal successors, (1302), 426 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1302 transitions. [2021-06-05 21:58:29,231 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1302 transitions. Word has length 19 [2021-06-05 21:58:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:29,231 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1302 transitions. [2021-06-05 21:58:29,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1302 transitions. [2021-06-05 21:58:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:29,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:29,232 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:29,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 21:58:29,432 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1445273620, now seen corresponding path program 17 times [2021-06-05 21:58:29,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:29,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059053510] [2021-06-05 21:58:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:29,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:29,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059053510] [2021-06-05 21:58:29,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059053510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:29,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101732466] [2021-06-05 21:58:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:29,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:29,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:29,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:29,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:29,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:29,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:29,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:29,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:29,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:29,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:29,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:29,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:29,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:29,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:29,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:29,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:29,863 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 21:58:29,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:29,864 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-05 21:58:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:29,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101732466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:29,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:29,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:29,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267849548] [2021-06-05 21:58:29,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:29,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:29,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:29,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:29,955 INFO L87 Difference]: Start difference. First operand 427 states and 1302 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:30,192 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 21:58:30,381 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 21:58:30,573 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 21:58:30,812 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 21:58:31,023 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-05 21:58:31,220 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 21:58:31,417 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 21:58:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:31,442 INFO L93 Difference]: Finished difference Result 698 states and 1967 transitions. [2021-06-05 21:58:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:31,443 INFO L225 Difference]: With dead ends: 698 [2021-06-05 21:58:31,443 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 21:58:31,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1577.4ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 21:58:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 425. [2021-06-05 21:58:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.0542452830188678) internal successors, (1295), 424 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1295 transitions. [2021-06-05 21:58:31,448 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1295 transitions. Word has length 19 [2021-06-05 21:58:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:31,448 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1295 transitions. [2021-06-05 21:58:31,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1295 transitions. [2021-06-05 21:58:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:31,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:31,449 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:31,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 21:58:31,649 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:31,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1969462800, now seen corresponding path program 18 times [2021-06-05 21:58:31,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:31,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647992319] [2021-06-05 21:58:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:31,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:31,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647992319] [2021-06-05 21:58:31,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647992319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:31,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627523792] [2021-06-05 21:58:31,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:31,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:58:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:31,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:32,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:32,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:32,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:32,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:32,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:32,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:32,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:32,074 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:32,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:32,079 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,113 INFO L628 ElimStorePlain]: treesize reduction 59, result has 42.2 percent of original size [2021-06-05 21:58:32,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:32,114 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:234, output treesize:43 [2021-06-05 21:58:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:32,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627523792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:32,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:32,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:32,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280635094] [2021-06-05 21:58:32,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:32,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:32,166 INFO L87 Difference]: Start difference. First operand 425 states and 1295 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:32,964 INFO L93 Difference]: Finished difference Result 673 states and 1948 transitions. [2021-06-05 21:58:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:58:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:32,965 INFO L225 Difference]: With dead ends: 673 [2021-06-05 21:58:32,965 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 21:58:32,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 21:58:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 428. [2021-06-05 21:58:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0679156908665104) internal successors, (1310), 427 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1310 transitions. [2021-06-05 21:58:32,970 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1310 transitions. Word has length 19 [2021-06-05 21:58:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:32,970 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1310 transitions. [2021-06-05 21:58:32,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1310 transitions. [2021-06-05 21:58:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:32,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:32,971 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:33,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 21:58:33,171 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -786696720, now seen corresponding path program 19 times [2021-06-05 21:58:33,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:33,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620940852] [2021-06-05 21:58:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:33,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620940852] [2021-06-05 21:58:33,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620940852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648627397] [2021-06-05 21:58:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:33,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:33,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:33,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:33,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:33,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:33,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:33,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,633 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 21:58:33,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:58:33,634 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-06-05 21:58:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648627397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:33,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:33,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:33,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992142622] [2021-06-05 21:58:33,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:33,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:33,738 INFO L87 Difference]: Start difference. First operand 428 states and 1310 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:34,295 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 21:58:34,467 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 21:58:34,605 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 21:58:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:34,628 INFO L93 Difference]: Finished difference Result 664 states and 1911 transitions. [2021-06-05 21:58:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:58:34,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:34,629 INFO L225 Difference]: With dead ends: 664 [2021-06-05 21:58:34,629 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 21:58:34,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1018.2ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 21:58:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 430. [2021-06-05 21:58:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.06993006993007) internal successors, (1317), 429 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1317 transitions. [2021-06-05 21:58:34,634 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1317 transitions. Word has length 19 [2021-06-05 21:58:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:34,634 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1317 transitions. [2021-06-05 21:58:34,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1317 transitions. [2021-06-05 21:58:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:34,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:34,635 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:34,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:34,835 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash 792680752, now seen corresponding path program 20 times [2021-06-05 21:58:34,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:34,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147640919] [2021-06-05 21:58:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:34,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:34,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147640919] [2021-06-05 21:58:34,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147640919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:34,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165679308] [2021-06-05 21:58:34,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:35,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:35,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:35,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:35,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:35,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:35,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:35,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:35,197 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:35,201 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:35,205 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:35,209 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:35,213 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:35,216 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:35,220 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:35,224 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:35,228 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:35,232 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:35,236 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:35,240 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:35,265 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:35,269 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:35,273 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:35,276 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,428 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 21:58:35,428 INFO L628 ElimStorePlain]: treesize reduction 205, result has 46.6 percent of original size [2021-06-05 21:58:35,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:58:35,430 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:807, output treesize:179 [2021-06-05 21:58:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:35,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165679308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:35,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:35,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:35,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750369543] [2021-06-05 21:58:35,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:35,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:35,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:35,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:35,637 INFO L87 Difference]: Start difference. First operand 430 states and 1317 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:36,278 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 21:58:36,418 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-06-05 21:58:36,566 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-06-05 21:58:36,742 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-05 21:58:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:36,747 INFO L93 Difference]: Finished difference Result 709 states and 2045 transitions. [2021-06-05 21:58:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:58:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:36,748 INFO L225 Difference]: With dead ends: 709 [2021-06-05 21:58:36,749 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 21:58:36,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1250.9ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 21:58:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 435. [2021-06-05 21:58:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.089861751152074) internal successors, (1341), 434 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1341 transitions. [2021-06-05 21:58:36,754 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1341 transitions. Word has length 19 [2021-06-05 21:58:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:36,754 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1341 transitions. [2021-06-05 21:58:36,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1341 transitions. [2021-06-05 21:58:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:36,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:36,754 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:36,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 21:58:36,955 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:36,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2085023152, now seen corresponding path program 21 times [2021-06-05 21:58:36,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:36,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800678075] [2021-06-05 21:58:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:37,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800678075] [2021-06-05 21:58:37,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800678075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305766901] [2021-06-05 21:58:37,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:37,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:58:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:37,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:37,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:37,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:37,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:37,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:37,299 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:37,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:37,308 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:37,313 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:37,317 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:37,321 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:37,326 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:37,330 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:37,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:37,338 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:37,342 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:37,346 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:37,350 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:37,354 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:37,358 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:37,363 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:37,366 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:37,369 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,520 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 21:58:37,520 INFO L628 ElimStorePlain]: treesize reduction 212, result has 45.8 percent of original size [2021-06-05 21:58:37,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:58:37,522 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-06-05 21:58:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:37,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305766901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:37,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:37,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:37,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57280780] [2021-06-05 21:58:37,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:37,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:37,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:37,797 INFO L87 Difference]: Start difference. First operand 435 states and 1341 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:38,424 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 21:58:38,606 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 21:58:38,859 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 21:58:39,078 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 21:58:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:39,121 INFO L93 Difference]: Finished difference Result 683 states and 1966 transitions. [2021-06-05 21:58:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:58:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:39,122 INFO L225 Difference]: With dead ends: 683 [2021-06-05 21:58:39,122 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 21:58:39,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1503.4ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 21:58:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 431. [2021-06-05 21:58:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0767441860465117) internal successors, (1323), 430 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1323 transitions. [2021-06-05 21:58:39,127 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1323 transitions. Word has length 19 [2021-06-05 21:58:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:39,127 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1323 transitions. [2021-06-05 21:58:39,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1323 transitions. [2021-06-05 21:58:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:39,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:39,127 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:39,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 21:58:39,328 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash 82616162, now seen corresponding path program 22 times [2021-06-05 21:58:39,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:39,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16891959] [2021-06-05 21:58:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:39,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:39,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16891959] [2021-06-05 21:58:39,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16891959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:39,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108453583] [2021-06-05 21:58:39,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:39,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:39,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:39,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:39,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:39,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:39,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:39,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:39,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:39,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:39,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:39,720 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:77, output treesize:35 [2021-06-05 21:58:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:39,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108453583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:39,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:39,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958701176] [2021-06-05 21:58:39,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:39,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:39,774 INFO L87 Difference]: Start difference. First operand 431 states and 1323 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:40,495 INFO L93 Difference]: Finished difference Result 647 states and 1852 transitions. [2021-06-05 21:58:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:40,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:40,496 INFO L225 Difference]: With dead ends: 647 [2021-06-05 21:58:40,496 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 21:58:40,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 21:58:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 438. [2021-06-05 21:58:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.077803203661327) internal successors, (1345), 437 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1345 transitions. [2021-06-05 21:58:40,501 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1345 transitions. Word has length 19 [2021-06-05 21:58:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:40,501 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1345 transitions. [2021-06-05 21:58:40,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1345 transitions. [2021-06-05 21:58:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:40,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:40,501 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:40,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 21:58:40,702 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:40,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:40,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1357822156, now seen corresponding path program 23 times [2021-06-05 21:58:40,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:40,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533571643] [2021-06-05 21:58:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:40,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533571643] [2021-06-05 21:58:40,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533571643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:40,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037462120] [2021-06-05 21:58:40,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:40,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:40,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:41,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:41,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:41,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:41,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:41,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:41,032 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:41,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:41,038 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:41,041 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:41,044 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:41,047 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:41,050 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,095 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:58:41,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:41,096 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:58:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:41,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037462120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:41,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:41,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:41,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378985004] [2021-06-05 21:58:41,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:41,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:41,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:41,218 INFO L87 Difference]: Start difference. First operand 438 states and 1345 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:42,087 INFO L93 Difference]: Finished difference Result 680 states and 1939 transitions. [2021-06-05 21:58:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:58:42,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:42,088 INFO L225 Difference]: With dead ends: 680 [2021-06-05 21:58:42,088 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 21:58:42,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 903.6ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:58:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 21:58:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 435. [2021-06-05 21:58:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.0806451612903225) internal successors, (1337), 434 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1337 transitions. [2021-06-05 21:58:42,093 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1337 transitions. Word has length 19 [2021-06-05 21:58:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:42,093 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1337 transitions. [2021-06-05 21:58:42,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1337 transitions. [2021-06-05 21:58:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:42,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:42,094 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:42,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 21:58:42,294 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:42,294 INFO L82 PathProgramCache]: Analyzing trace with hash 790974380, now seen corresponding path program 24 times [2021-06-05 21:58:42,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:42,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005382622] [2021-06-05 21:58:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:42,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:42,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005382622] [2021-06-05 21:58:42,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005382622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:42,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680503165] [2021-06-05 21:58:42,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:42,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:58:42,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:42,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:42,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:42,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:42,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:42,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:42,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:42,611 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:42,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:42,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:42,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:42,623 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:42,626 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:42,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,674 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:58:42,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:42,675 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:58:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:42,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680503165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:42,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:42,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:42,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817140644] [2021-06-05 21:58:42,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:42,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:42,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:42,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:42,771 INFO L87 Difference]: Start difference. First operand 435 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:43,707 INFO L93 Difference]: Finished difference Result 683 states and 1935 transitions. [2021-06-05 21:58:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:43,708 INFO L225 Difference]: With dead ends: 683 [2021-06-05 21:58:43,708 INFO L226 Difference]: Without dead ends: 653 [2021-06-05 21:58:43,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 946.1ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:58:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-05 21:58:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 438. [2021-06-05 21:58:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.0846681922196795) internal successors, (1348), 437 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1348 transitions. [2021-06-05 21:58:43,713 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1348 transitions. Word has length 19 [2021-06-05 21:58:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:43,713 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1348 transitions. [2021-06-05 21:58:43,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1348 transitions. [2021-06-05 21:58:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:43,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:43,714 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:43,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:43,915 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:43,915 INFO L82 PathProgramCache]: Analyzing trace with hash -702933342, now seen corresponding path program 25 times [2021-06-05 21:58:43,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:43,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478742048] [2021-06-05 21:58:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:44,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:44,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478742048] [2021-06-05 21:58:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478742048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:44,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28821097] [2021-06-05 21:58:44,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:44,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:44,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:44,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:44,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:44,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:44,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:44,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:44,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:44,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,324 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 21:58:44,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:44,325 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-05 21:58:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:44,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28821097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:44,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:44,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:44,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879391712] [2021-06-05 21:58:44,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:44,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:44,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:44,384 INFO L87 Difference]: Start difference. First operand 438 states and 1348 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:45,012 INFO L93 Difference]: Finished difference Result 585 states and 1709 transitions. [2021-06-05 21:58:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:45,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:45,013 INFO L225 Difference]: With dead ends: 585 [2021-06-05 21:58:45,013 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 21:58:45,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 21:58:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 438. [2021-06-05 21:58:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.077803203661327) internal successors, (1345), 437 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1345 transitions. [2021-06-05 21:58:45,017 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1345 transitions. Word has length 19 [2021-06-05 21:58:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:45,017 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1345 transitions. [2021-06-05 21:58:45,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1345 transitions. [2021-06-05 21:58:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:45,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:45,018 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:45,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 21:58:45,219 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1901193260, now seen corresponding path program 26 times [2021-06-05 21:58:45,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:45,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932515833] [2021-06-05 21:58:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:45,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:45,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932515833] [2021-06-05 21:58:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932515833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805762679] [2021-06-05 21:58:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:45,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:45,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:45,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:45,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:45,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:45,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:45,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:45,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:45,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:45,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:45,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:45,620 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:45,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:45,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:45,655 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 21:58:45,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:45,656 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:43 [2021-06-05 21:58:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:45,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805762679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:45,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:45,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:45,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993301522] [2021-06-05 21:58:45,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:45,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:45,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:45,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:45,717 INFO L87 Difference]: Start difference. First operand 438 states and 1345 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:46,447 INFO L93 Difference]: Finished difference Result 618 states and 1805 transitions. [2021-06-05 21:58:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:46,448 INFO L225 Difference]: With dead ends: 618 [2021-06-05 21:58:46,448 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 21:58:46,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 21:58:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 444. [2021-06-05 21:58:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.0880361173814896) internal successors, (1368), 443 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1368 transitions. [2021-06-05 21:58:46,453 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1368 transitions. Word has length 19 [2021-06-05 21:58:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:46,454 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1368 transitions. [2021-06-05 21:58:46,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1368 transitions. [2021-06-05 21:58:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:46,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:46,454 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:46,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-05 21:58:46,669 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash 460754942, now seen corresponding path program 27 times [2021-06-05 21:58:46,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:46,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534142888] [2021-06-05 21:58:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:46,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534142888] [2021-06-05 21:58:46,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534142888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102227327] [2021-06-05 21:58:46,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:46,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:58:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:47,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:47,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:47,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:47,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:47,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:47,017 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:47,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:47,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:47,026 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:47,029 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:47,032 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:47,034 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,090 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:58:47,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:47,091 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:58:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:47,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102227327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:47,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:47,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:47,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470524560] [2021-06-05 21:58:47,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:47,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:47,202 INFO L87 Difference]: Start difference. First operand 444 states and 1368 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:48,022 INFO L93 Difference]: Finished difference Result 666 states and 1900 transitions. [2021-06-05 21:58:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:58:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:48,023 INFO L225 Difference]: With dead ends: 666 [2021-06-05 21:58:48,023 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 21:58:48,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 832.5ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 21:58:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 441. [2021-06-05 21:58:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.090909090909091) internal successors, (1360), 440 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1360 transitions. [2021-06-05 21:58:48,028 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1360 transitions. Word has length 19 [2021-06-05 21:58:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:48,028 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1360 transitions. [2021-06-05 21:58:48,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:48,029 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1360 transitions. [2021-06-05 21:58:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:48,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:48,029 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:48,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 21:58:48,229 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1211007956, now seen corresponding path program 28 times [2021-06-05 21:58:48,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:48,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13983151] [2021-06-05 21:58:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:48,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:48,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13983151] [2021-06-05 21:58:48,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13983151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:48,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123881672] [2021-06-05 21:58:48,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:48,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:48,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:48,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:48,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:48,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:48,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:48,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:48,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:48,627 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:48,630 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:48,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,697 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 21:58:48,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 21:58:48,699 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-05 21:58:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:48,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123881672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:48,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:48,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:48,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500531060] [2021-06-05 21:58:48,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:48,802 INFO L87 Difference]: Start difference. First operand 441 states and 1360 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,298 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-05 21:58:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:49,547 INFO L93 Difference]: Finished difference Result 592 states and 1730 transitions. [2021-06-05 21:58:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:58:49,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:49,548 INFO L225 Difference]: With dead ends: 592 [2021-06-05 21:58:49,548 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 21:58:49,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 849.3ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 21:58:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 439. [2021-06-05 21:58:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.084474885844749) internal successors, (1351), 438 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1351 transitions. [2021-06-05 21:58:49,553 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1351 transitions. Word has length 19 [2021-06-05 21:58:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:49,553 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1351 transitions. [2021-06-05 21:58:49,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1351 transitions. [2021-06-05 21:58:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:49,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:49,554 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:49,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-06-05 21:58:49,754 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:49,755 INFO L82 PathProgramCache]: Analyzing trace with hash 368369516, now seen corresponding path program 29 times [2021-06-05 21:58:49,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:49,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946823151] [2021-06-05 21:58:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:49,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:49,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946823151] [2021-06-05 21:58:49,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946823151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:49,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258489347] [2021-06-05 21:58:49,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:49,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:50,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:50,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:50,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:50,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:50,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:50,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:50,105 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:50,109 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:50,113 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:50,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:50,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:50,125 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:50,128 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:50,133 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:50,136 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:50,140 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:50,143 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,285 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 21:58:50,285 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 21:58:50,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:58:50,287 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 21:58:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:50,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258489347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:50,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:50,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:50,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099306799] [2021-06-05 21:58:50,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:50,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:50,484 INFO L87 Difference]: Start difference. First operand 439 states and 1351 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:50,982 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 21:58:51,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:51,179 INFO L93 Difference]: Finished difference Result 643 states and 1872 transitions. [2021-06-05 21:58:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:58:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:51,180 INFO L225 Difference]: With dead ends: 643 [2021-06-05 21:58:51,180 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 21:58:51,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 850.7ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 21:58:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 442. [2021-06-05 21:58:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-05 21:58:51,185 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-05 21:58:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:51,185 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-05 21:58:51,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-05 21:58:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:51,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:51,186 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:51,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 21:58:51,389 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1992707284, now seen corresponding path program 30 times [2021-06-05 21:58:51,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:51,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070758936] [2021-06-05 21:58:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:51,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:51,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070758936] [2021-06-05 21:58:51,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070758936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:51,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907785863] [2021-06-05 21:58:51,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:51,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:58:51,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:51,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:51,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:51,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:51,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:51,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:51,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:51,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:51,790 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:51,798 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:51,802 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:51,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:51,809 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:51,812 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:51,816 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:51,820 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:51,823 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:51,826 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,978 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 21:58:51,978 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 21:58:51,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:58:51,980 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-05 21:58:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:52,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907785863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:52,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:52,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:52,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266274442] [2021-06-05 21:58:52,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:52,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:52,245 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:52,755 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 21:58:52,892 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 21:58:53,020 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 21:58:53,170 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 21:58:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:53,348 INFO L93 Difference]: Finished difference Result 626 states and 1833 transitions. [2021-06-05 21:58:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:53,349 INFO L225 Difference]: With dead ends: 626 [2021-06-05 21:58:53,349 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 21:58:53,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1250.0ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 21:58:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 439. [2021-06-05 21:58:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.084474885844749) internal successors, (1351), 438 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1351 transitions. [2021-06-05 21:58:53,353 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1351 transitions. Word has length 19 [2021-06-05 21:58:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:53,353 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1351 transitions. [2021-06-05 21:58:53,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1351 transitions. [2021-06-05 21:58:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:53,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:53,354 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:53,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 21:58:53,554 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:53,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2072973826, now seen corresponding path program 31 times [2021-06-05 21:58:53,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:53,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878768340] [2021-06-05 21:58:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:53,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:53,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878768340] [2021-06-05 21:58:53,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878768340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:53,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130259632] [2021-06-05 21:58:53,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:53,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:53,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:53,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:53,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:53,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:53,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:53,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:53,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:53,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:53,936 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:53,939 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:53,942 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:53,945 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:54,015 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:58:54,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:58:54,016 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:58:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:54,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130259632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:54,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:54,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:54,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109568736] [2021-06-05 21:58:54,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:54,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:54,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:54,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:54,104 INFO L87 Difference]: Start difference. First operand 439 states and 1351 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:54,788 INFO L93 Difference]: Finished difference Result 657 states and 1908 transitions. [2021-06-05 21:58:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:54,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:54,789 INFO L225 Difference]: With dead ends: 657 [2021-06-05 21:58:54,789 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 21:58:54,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 758.1ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 21:58:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 442. [2021-06-05 21:58:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-05 21:58:54,794 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-05 21:58:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:54,794 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-05 21:58:54,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-05 21:58:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:54,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:54,795 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:54,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 21:58:54,995 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1321573388, now seen corresponding path program 32 times [2021-06-05 21:58:54,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:54,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263336885] [2021-06-05 21:58:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:55,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:55,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263336885] [2021-06-05 21:58:55,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263336885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:55,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445898174] [2021-06-05 21:58:55,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:55,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:55,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:55,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:55,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:55,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:55,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:55,357 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:55,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:55,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:55,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:55,372 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:55,375 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:55,379 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:55,382 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:55,386 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:55,389 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:55,393 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:55,396 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,535 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 21:58:55,536 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 21:58:55,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:58:55,537 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 21:58:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:55,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445898174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:55,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:55,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:55,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138434369] [2021-06-05 21:58:55,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:55,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:55,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:55,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:55,725 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,361 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 21:58:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:56,602 INFO L93 Difference]: Finished difference Result 674 states and 1970 transitions. [2021-06-05 21:58:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:56,603 INFO L225 Difference]: With dead ends: 674 [2021-06-05 21:58:56,603 INFO L226 Difference]: Without dead ends: 659 [2021-06-05 21:58:56,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 988.7ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-05 21:58:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 447. [2021-06-05 21:58:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.116591928251121) internal successors, (1390), 446 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1390 transitions. [2021-06-05 21:58:56,608 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1390 transitions. Word has length 19 [2021-06-05 21:58:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:56,608 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1390 transitions. [2021-06-05 21:58:56,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,608 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1390 transitions. [2021-06-05 21:58:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:56,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:56,609 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:56,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:56,809 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash -29230988, now seen corresponding path program 33 times [2021-06-05 21:58:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:56,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938922120] [2021-06-05 21:58:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:56,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938922120] [2021-06-05 21:58:56,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938922120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325700419] [2021-06-05 21:58:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:56,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:58:56,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:56,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:56,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:57,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:57,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:57,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:57,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:57,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:57,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:57,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:57,143 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:57,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:57,151 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:57,154 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:58:57,166 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:58:57,170 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:58:57,174 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:58:57,177 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:57,180 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:58:57,184 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:57,323 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 21:58:57,323 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 21:58:57,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:58:57,325 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 21:58:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:57,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325700419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:57,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:57,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:57,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709024511] [2021-06-05 21:58:57,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:57,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:57,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:57,551 INFO L87 Difference]: Start difference. First operand 447 states and 1390 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:58,181 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 21:58:58,340 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 21:58:58,480 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 21:58:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:58,625 INFO L93 Difference]: Finished difference Result 648 states and 1904 transitions. [2021-06-05 21:58:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:58:58,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:58,627 INFO L225 Difference]: With dead ends: 648 [2021-06-05 21:58:58,627 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 21:58:58,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1179.7ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 21:58:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 442. [2021-06-05 21:58:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-05 21:58:58,632 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-05 21:58:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:58,632 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-05 21:58:58,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-05 21:58:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:58,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:58,632 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:58,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 21:58:58,833 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:58,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1586593584, now seen corresponding path program 34 times [2021-06-05 21:58:58,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:58,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578335817] [2021-06-05 21:58:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:58,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:58,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578335817] [2021-06-05 21:58:58,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578335817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:58,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211248532] [2021-06-05 21:58:58,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:58,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:58,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:58:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:59,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:58:59,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:59,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:58:59,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:59,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:59,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:59,152 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 21:58:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:59,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211248532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:59,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:59,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:58:59,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826815695] [2021-06-05 21:58:59,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:59,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:59,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:59,200 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:59,616 INFO L93 Difference]: Finished difference Result 601 states and 1760 transitions. [2021-06-05 21:58:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:58:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:59,617 INFO L225 Difference]: With dead ends: 601 [2021-06-05 21:58:59,617 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 21:58:59,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 493.5ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 21:58:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 452. [2021-06-05 21:58:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0931263858093128) internal successors, (1395), 451 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1395 transitions. [2021-06-05 21:58:59,622 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1395 transitions. Word has length 19 [2021-06-05 21:58:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:59,622 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1395 transitions. [2021-06-05 21:58:59,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1395 transitions. [2021-06-05 21:58:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:59,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:59,623 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:59,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:59,823 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash 146155266, now seen corresponding path program 35 times [2021-06-05 21:58:59,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:59,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740347562] [2021-06-05 21:58:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:59,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:59,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740347562] [2021-06-05 21:58:59,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740347562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:59,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565394223] [2021-06-05 21:58:59,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:59,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:59,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:59,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:00,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:00,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:00,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:00,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:00,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:00,159 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:00,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:00,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:00,168 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:00,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:00,174 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:00,178 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:00,223 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:59:00,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:00,224 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:59:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:00,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565394223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:00,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:00,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:00,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108093849] [2021-06-05 21:59:00,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:00,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:00,312 INFO L87 Difference]: Start difference. First operand 452 states and 1395 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:01,017 INFO L93 Difference]: Finished difference Result 667 states and 1932 transitions. [2021-06-05 21:59:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:59:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:01,018 INFO L225 Difference]: With dead ends: 667 [2021-06-05 21:59:01,018 INFO L226 Difference]: Without dead ends: 637 [2021-06-05 21:59:01,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 804.8ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-05 21:59:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 455. [2021-06-05 21:59:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.0969162995594712) internal successors, (1406), 454 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1406 transitions. [2021-06-05 21:59:01,023 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1406 transitions. Word has length 19 [2021-06-05 21:59:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:01,023 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1406 transitions. [2021-06-05 21:59:01,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1406 transitions. [2021-06-05 21:59:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:01,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:01,023 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:01,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-05 21:59:01,224 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:01,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2000015494, now seen corresponding path program 36 times [2021-06-05 21:59:01,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:01,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805684145] [2021-06-05 21:59:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:01,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:01,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805684145] [2021-06-05 21:59:01,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805684145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:01,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382535477] [2021-06-05 21:59:01,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:01,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:01,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:01,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:01,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:01,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:01,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:01,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:01,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:01,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:01,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:01,603 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:01,607 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:01,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,659 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-06-05 21:59:01,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:01,660 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:279, output treesize:61 [2021-06-05 21:59:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:01,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382535477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:01,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:01,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:01,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128989742] [2021-06-05 21:59:01,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:01,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:01,755 INFO L87 Difference]: Start difference. First operand 455 states and 1406 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:02,611 INFO L93 Difference]: Finished difference Result 788 states and 2213 transitions. [2021-06-05 21:59:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:02,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:02,613 INFO L225 Difference]: With dead ends: 788 [2021-06-05 21:59:02,613 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 21:59:02,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 962.9ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:59:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 21:59:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 458. [2021-06-05 21:59:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1006564551422318) internal successors, (1417), 457 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1417 transitions. [2021-06-05 21:59:02,619 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1417 transitions. Word has length 19 [2021-06-05 21:59:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:02,619 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1417 transitions. [2021-06-05 21:59:02,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1417 transitions. [2021-06-05 21:59:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:02,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:02,619 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:02,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable784,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:02,820 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:02,820 INFO L82 PathProgramCache]: Analyzing trace with hash 801044080, now seen corresponding path program 37 times [2021-06-05 21:59:02,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:02,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077694778] [2021-06-05 21:59:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:02,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:02,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077694778] [2021-06-05 21:59:02,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077694778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:02,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501509884] [2021-06-05 21:59:02,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:02,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:03,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:03,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:03,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:03,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:03,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:03,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:03,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:03,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:03,169 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 21:59:03,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:03,169 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 21:59:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:03,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501509884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:03,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:03,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:03,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089249730] [2021-06-05 21:59:03,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:03,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:03,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:03,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:03,225 INFO L87 Difference]: Start difference. First operand 458 states and 1417 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:03,886 INFO L93 Difference]: Finished difference Result 711 states and 2031 transitions. [2021-06-05 21:59:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:03,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:03,888 INFO L225 Difference]: With dead ends: 711 [2021-06-05 21:59:03,888 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 21:59:03,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 692.5ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 21:59:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 458. [2021-06-05 21:59:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.0940919037199124) internal successors, (1414), 457 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1414 transitions. [2021-06-05 21:59:03,893 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1414 transitions. Word has length 19 [2021-06-05 21:59:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:03,893 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1414 transitions. [2021-06-05 21:59:03,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1414 transitions. [2021-06-05 21:59:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:03,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:03,893 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:04,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:04,094 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:04,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1282259270, now seen corresponding path program 38 times [2021-06-05 21:59:04,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:04,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284709745] [2021-06-05 21:59:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:04,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:04,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284709745] [2021-06-05 21:59:04,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284709745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:04,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544832024] [2021-06-05 21:59:04,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:04,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:04,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:04,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:04,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:04,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:04,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:04,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:04,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:04,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:04,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:04,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:04,446 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,498 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 21:59:04,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:04,499 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:273, output treesize:61 [2021-06-05 21:59:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:04,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544832024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:04,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:04,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:04,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851669438] [2021-06-05 21:59:04,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:04,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:04,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:04,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:04,602 INFO L87 Difference]: Start difference. First operand 458 states and 1414 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:05,862 INFO L93 Difference]: Finished difference Result 843 states and 2398 transitions. [2021-06-05 21:59:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:59:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:05,863 INFO L225 Difference]: With dead ends: 843 [2021-06-05 21:59:05,863 INFO L226 Difference]: Without dead ends: 799 [2021-06-05 21:59:05,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1307.6ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-05 21:59:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 464. [2021-06-05 21:59:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.101511879049676) internal successors, (1436), 463 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1436 transitions. [2021-06-05 21:59:05,869 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1436 transitions. Word has length 19 [2021-06-05 21:59:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:05,869 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1436 transitions. [2021-06-05 21:59:05,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1436 transitions. [2021-06-05 21:59:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:05,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:05,870 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:06,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 21:59:06,070 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash -454876694, now seen corresponding path program 39 times [2021-06-05 21:59:06,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:06,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402691101] [2021-06-05 21:59:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:06,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:06,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402691101] [2021-06-05 21:59:06,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402691101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:06,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128614042] [2021-06-05 21:59:06,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:06,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:06,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:06,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:06,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:06,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:06,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:06,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:06,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:06,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,467 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 21:59:06,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:06,468 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 21:59:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:06,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128614042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:06,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:06,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:06,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772136190] [2021-06-05 21:59:06,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:06,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:06,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:06,529 INFO L87 Difference]: Start difference. First operand 464 states and 1436 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:07,185 INFO L93 Difference]: Finished difference Result 621 states and 1843 transitions. [2021-06-05 21:59:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:07,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:07,186 INFO L225 Difference]: With dead ends: 621 [2021-06-05 21:59:07,186 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 21:59:07,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 745.8ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 21:59:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 471. [2021-06-05 21:59:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.108510638297872) internal successors, (1461), 470 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1461 transitions. [2021-06-05 21:59:07,191 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1461 transitions. Word has length 19 [2021-06-05 21:59:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:07,191 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1461 transitions. [2021-06-05 21:59:07,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1461 transitions. [2021-06-05 21:59:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:07,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:07,192 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:07,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:07,401 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:07,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1895315012, now seen corresponding path program 40 times [2021-06-05 21:59:07,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:07,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36257817] [2021-06-05 21:59:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:07,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:07,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36257817] [2021-06-05 21:59:07,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36257817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:07,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984952718] [2021-06-05 21:59:07,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:07,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:07,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:07,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:07,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:07,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:07,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:07,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:07,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:07,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:07,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:07,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:07,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:07,762 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:07,766 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:07,769 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:07,772 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,829 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 21:59:07,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:07,830 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:426, output treesize:67 [2021-06-05 21:59:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:07,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984952718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:07,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:07,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:07,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075577735] [2021-06-05 21:59:07,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:07,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:07,945 INFO L87 Difference]: Start difference. First operand 471 states and 1461 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:08,751 INFO L93 Difference]: Finished difference Result 692 states and 1995 transitions. [2021-06-05 21:59:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:08,752 INFO L225 Difference]: With dead ends: 692 [2021-06-05 21:59:08,752 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 21:59:08,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 892.3ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 21:59:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 474. [2021-06-05 21:59:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.105708245243129) internal successors, (1469), 473 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1469 transitions. [2021-06-05 21:59:08,757 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1469 transitions. Word has length 19 [2021-06-05 21:59:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:08,757 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1469 transitions. [2021-06-05 21:59:08,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1469 transitions. [2021-06-05 21:59:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:08,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:08,758 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:08,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:08,958 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:08,958 INFO L82 PathProgramCache]: Analyzing trace with hash 253481524, now seen corresponding path program 41 times [2021-06-05 21:59:08,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:08,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334440212] [2021-06-05 21:59:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:09,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:09,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334440212] [2021-06-05 21:59:09,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334440212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:09,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339892091] [2021-06-05 21:59:09,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:09,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:09,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:09,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:09,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:09,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:09,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:09,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:09,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:09,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:09,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:09,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:09,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:09,304 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:09,307 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:09,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:09,314 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:09,317 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,375 INFO L628 ElimStorePlain]: treesize reduction 58, result has 50.4 percent of original size [2021-06-05 21:59:09,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:09,375 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:430, output treesize:59 [2021-06-05 21:59:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:09,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339892091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:09,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:09,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:09,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558150731] [2021-06-05 21:59:09,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:09,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:09,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:09,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:09,473 INFO L87 Difference]: Start difference. First operand 474 states and 1469 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:10,562 INFO L93 Difference]: Finished difference Result 744 states and 2129 transitions. [2021-06-05 21:59:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:59:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:10,563 INFO L225 Difference]: With dead ends: 744 [2021-06-05 21:59:10,563 INFO L226 Difference]: Without dead ends: 701 [2021-06-05 21:59:10,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1119.1ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:59:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-05 21:59:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 474. [2021-06-05 21:59:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.105708245243129) internal successors, (1469), 473 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1469 transitions. [2021-06-05 21:59:10,569 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1469 transitions. Word has length 19 [2021-06-05 21:59:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:10,569 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1469 transitions. [2021-06-05 21:59:10,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1469 transitions. [2021-06-05 21:59:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:10,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:10,569 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:10,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-05 21:59:10,770 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1363700404, now seen corresponding path program 42 times [2021-06-05 21:59:10,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:10,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191347324] [2021-06-05 21:59:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:10,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:10,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191347324] [2021-06-05 21:59:10,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191347324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:10,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086110297] [2021-06-05 21:59:10,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:10,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:59:10,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:10,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:11,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:11,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:11,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:11,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,154 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 21:59:11,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:11,154 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 21:59:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:11,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086110297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:11,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:11,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:11,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676957451] [2021-06-05 21:59:11,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:11,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:11,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:11,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:11,206 INFO L87 Difference]: Start difference. First operand 474 states and 1469 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:11,834 INFO L93 Difference]: Finished difference Result 646 states and 1910 transitions. [2021-06-05 21:59:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:59:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:11,835 INFO L225 Difference]: With dead ends: 646 [2021-06-05 21:59:11,835 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 21:59:11,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 685.1ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 21:59:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 480. [2021-06-05 21:59:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.11482254697286) internal successors, (1492), 479 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1492 transitions. [2021-06-05 21:59:11,840 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1492 transitions. Word has length 19 [2021-06-05 21:59:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:11,840 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1492 transitions. [2021-06-05 21:59:11,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1492 transitions. [2021-06-05 21:59:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:11,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:11,841 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:12,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-06-05 21:59:12,041 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:12,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:12,041 INFO L82 PathProgramCache]: Analyzing trace with hash -76737914, now seen corresponding path program 43 times [2021-06-05 21:59:12,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:12,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158169114] [2021-06-05 21:59:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:12,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158169114] [2021-06-05 21:59:12,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158169114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208599956] [2021-06-05 21:59:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:12,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:12,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:12,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:12,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:12,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:12,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:12,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:12,419 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:12,422 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:12,426 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:12,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,483 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 21:59:12,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:12,484 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 21:59:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:12,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208599956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:12,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:12,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:12,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819827615] [2021-06-05 21:59:12,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:12,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:12,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:12,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:12,583 INFO L87 Difference]: Start difference. First operand 480 states and 1492 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:13,310 INFO L93 Difference]: Finished difference Result 694 states and 1999 transitions. [2021-06-05 21:59:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:13,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:13,312 INFO L225 Difference]: With dead ends: 694 [2021-06-05 21:59:13,312 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 21:59:13,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 21:59:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 477. [2021-06-05 21:59:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1176470588235294) internal successors, (1484), 476 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1484 transitions. [2021-06-05 21:59:13,317 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1484 transitions. Word has length 19 [2021-06-05 21:59:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:13,317 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1484 transitions. [2021-06-05 21:59:13,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1484 transitions. [2021-06-05 21:59:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:13,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:13,318 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:13,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-05 21:59:13,518 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1748500812, now seen corresponding path program 44 times [2021-06-05 21:59:13,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:13,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406649330] [2021-06-05 21:59:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:13,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406649330] [2021-06-05 21:59:13,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406649330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768040716] [2021-06-05 21:59:13,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:13,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:13,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:13,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:13,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:13,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:13,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:13,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:13,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:13,903 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:13,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:13,909 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:13,913 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:13,916 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:13,919 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:13,922 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,998 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-05 21:59:13,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 21:59:13,999 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-05 21:59:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768040716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:14,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:14,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:14,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969113003] [2021-06-05 21:59:14,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:14,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:14,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:14,111 INFO L87 Difference]: Start difference. First operand 477 states and 1484 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:14,570 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 21:59:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:15,019 INFO L93 Difference]: Finished difference Result 653 states and 1948 transitions. [2021-06-05 21:59:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:15,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:15,021 INFO L225 Difference]: With dead ends: 653 [2021-06-05 21:59:15,021 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 21:59:15,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 953.0ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 21:59:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 477. [2021-06-05 21:59:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1176470588235294) internal successors, (1484), 476 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1484 transitions. [2021-06-05 21:59:15,026 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1484 transitions. Word has length 19 [2021-06-05 21:59:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:15,026 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1484 transitions. [2021-06-05 21:59:15,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1484 transitions. [2021-06-05 21:59:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:15,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:15,026 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:15,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:15,227 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:15,227 INFO L82 PathProgramCache]: Analyzing trace with hash -169123340, now seen corresponding path program 45 times [2021-06-05 21:59:15,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:15,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821606314] [2021-06-05 21:59:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:15,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:15,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821606314] [2021-06-05 21:59:15,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821606314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:15,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447805165] [2021-06-05 21:59:15,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:15,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:15,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:15,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:15,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:15,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:15,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:15,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:15,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:15,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:15,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:15,552 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:15,556 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:15,561 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:15,565 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:15,569 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:15,573 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:15,577 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:15,581 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:15,585 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:15,589 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:15,593 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:15,596 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:15,600 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:15,604 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:15,608 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:15,611 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:15,615 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,769 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 21:59:15,769 INFO L628 ElimStorePlain]: treesize reduction 212, result has 45.8 percent of original size [2021-06-05 21:59:15,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:59:15,771 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-06-05 21:59:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:15,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447805165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:15,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:15,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:15,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750491946] [2021-06-05 21:59:15,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:15,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:15,970 INFO L87 Difference]: Start difference. First operand 477 states and 1484 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:16,493 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 21:59:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:16,727 INFO L93 Difference]: Finished difference Result 696 states and 2047 transitions. [2021-06-05 21:59:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:16,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:16,728 INFO L225 Difference]: With dead ends: 696 [2021-06-05 21:59:16,728 INFO L226 Difference]: Without dead ends: 681 [2021-06-05 21:59:16,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 844.6ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-05 21:59:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 482. [2021-06-05 21:59:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.135135135135135) internal successors, (1508), 481 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1508 transitions. [2021-06-05 21:59:16,733 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1508 transitions. Word has length 19 [2021-06-05 21:59:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:16,733 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1508 transitions. [2021-06-05 21:59:16,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1508 transitions. [2021-06-05 21:59:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:16,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:16,734 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:16,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:16,934 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1123219060, now seen corresponding path program 46 times [2021-06-05 21:59:16,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:16,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416357225] [2021-06-05 21:59:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:17,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:17,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416357225] [2021-06-05 21:59:17,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416357225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:17,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093279917] [2021-06-05 21:59:17,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:17,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:17,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:17,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:17,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:17,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:17,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:17,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:17,293 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:17,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:17,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:17,305 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:17,309 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:17,313 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:17,317 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:17,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:17,325 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:17,328 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:17,332 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:17,336 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:17,340 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:17,344 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,541 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-05 21:59:17,541 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-06-05 21:59:17,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 21:59:17,544 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-05 21:59:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:17,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093279917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:17,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:17,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142088745] [2021-06-05 21:59:17,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:17,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:17,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:17,835 INFO L87 Difference]: Start difference. First operand 482 states and 1508 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:18,371 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 21:59:18,631 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 21:59:18,820 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 21:59:18,947 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-05 21:59:19,127 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-06-05 21:59:19,308 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 21:59:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:19,412 INFO L93 Difference]: Finished difference Result 686 states and 2025 transitions. [2021-06-05 21:59:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:19,413 INFO L225 Difference]: With dead ends: 686 [2021-06-05 21:59:19,413 INFO L226 Difference]: Without dead ends: 664 [2021-06-05 21:59:19,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1773.5ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-05 21:59:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 478. [2021-06-05 21:59:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1236897274633124) internal successors, (1490), 477 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1490 transitions. [2021-06-05 21:59:19,418 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1490 transitions. Word has length 19 [2021-06-05 21:59:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:19,418 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1490 transitions. [2021-06-05 21:59:19,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1490 transitions. [2021-06-05 21:59:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:19,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:19,419 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:19,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:19,619 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:19,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1684500614, now seen corresponding path program 47 times [2021-06-05 21:59:19,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:19,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456331710] [2021-06-05 21:59:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:19,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:19,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456331710] [2021-06-05 21:59:19,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456331710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:19,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938102730] [2021-06-05 21:59:19,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:19,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:19,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:19,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:19,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:19,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:19,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:19,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:19,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:19,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:19,988 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:19,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:19,994 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:19,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:20,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:20,001 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:20,057 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:59:20,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:20,058 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:59:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:20,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938102730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:20,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:20,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:20,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141741937] [2021-06-05 21:59:20,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:20,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:20,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:20,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:20,161 INFO L87 Difference]: Start difference. First operand 478 states and 1490 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:20,940 INFO L93 Difference]: Finished difference Result 706 states and 2077 transitions. [2021-06-05 21:59:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:59:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:20,942 INFO L225 Difference]: With dead ends: 706 [2021-06-05 21:59:20,942 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 21:59:20,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 823.4ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 21:59:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 481. [2021-06-05 21:59:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.1354166666666665) internal successors, (1505), 480 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1505 transitions. [2021-06-05 21:59:20,947 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1505 transitions. Word has length 19 [2021-06-05 21:59:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:20,947 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1505 transitions. [2021-06-05 21:59:20,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1505 transitions. [2021-06-05 21:59:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:20,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:20,948 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:21,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 21:59:21,148 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:21,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1859066244, now seen corresponding path program 48 times [2021-06-05 21:59:21,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:21,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425997655] [2021-06-05 21:59:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:21,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:21,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425997655] [2021-06-05 21:59:21,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425997655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:21,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21471392] [2021-06-05 21:59:21,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:21,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:21,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:21,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:21,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:21,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:21,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:21,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:21,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:21,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:21,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:21,522 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:21,526 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:21,529 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:21,533 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:21,537 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:21,541 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:21,546 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:21,549 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:21,553 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:21,556 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:21,702 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 21:59:21,702 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 21:59:21,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:59:21,704 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 21:59:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:21,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21471392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:21,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:21,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:21,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329668763] [2021-06-05 21:59:21,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:21,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:21,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:21,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:21,908 INFO L87 Difference]: Start difference. First operand 481 states and 1505 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:22,412 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 21:59:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:22,614 INFO L93 Difference]: Finished difference Result 682 states and 2026 transitions. [2021-06-05 21:59:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:59:22,614 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:22,615 INFO L225 Difference]: With dead ends: 682 [2021-06-05 21:59:22,615 INFO L226 Difference]: Without dead ends: 667 [2021-06-05 21:59:22,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 854.1ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-06-05 21:59:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 484. [2021-06-05 21:59:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1469979296066253) internal successors, (1520), 483 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1520 transitions. [2021-06-05 21:59:22,620 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1520 transitions. Word has length 19 [2021-06-05 21:59:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:22,620 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1520 transitions. [2021-06-05 21:59:22,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1520 transitions. [2021-06-05 21:59:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:22,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:22,621 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 21:59:22,821 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash -566723844, now seen corresponding path program 49 times [2021-06-05 21:59:22,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:22,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62266976] [2021-06-05 21:59:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:22,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:22,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62266976] [2021-06-05 21:59:22,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62266976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:22,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892516488] [2021-06-05 21:59:22,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:22,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:23,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:23,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:23,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:23,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:23,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:23,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:23,139 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:23,143 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:23,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:23,150 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:23,154 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:23,158 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:23,162 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:23,165 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:23,175 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:23,179 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:23,184 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,328 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 21:59:23,328 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 21:59:23,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:59:23,330 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 21:59:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:23,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892516488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:23,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:23,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328899322] [2021-06-05 21:59:23,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:23,556 INFO L87 Difference]: Start difference. First operand 484 states and 1520 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:24,098 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 21:59:24,238 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 21:59:24,375 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 21:59:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:24,535 INFO L93 Difference]: Finished difference Result 690 states and 2041 transitions. [2021-06-05 21:59:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:24,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:24,536 INFO L225 Difference]: With dead ends: 690 [2021-06-05 21:59:24,536 INFO L226 Difference]: Without dead ends: 675 [2021-06-05 21:59:24,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1107.3ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-05 21:59:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 483. [2021-06-05 21:59:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.141078838174274) internal successors, (1514), 482 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1514 transitions. [2021-06-05 21:59:24,542 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1514 transitions. Word has length 19 [2021-06-05 21:59:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:24,542 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1514 transitions. [2021-06-05 21:59:24,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1514 transitions. [2021-06-05 21:59:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:24,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:24,542 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:24,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 21:59:24,758 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:24,759 INFO L82 PathProgramCache]: Analyzing trace with hash 541213654, now seen corresponding path program 50 times [2021-06-05 21:59:24,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:24,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765867037] [2021-06-05 21:59:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:24,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:24,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765867037] [2021-06-05 21:59:24,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765867037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:24,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003364437] [2021-06-05 21:59:24,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:24,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:24,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:24,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:25,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:25,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:25,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:25,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:25,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:25,166 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:25,169 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:25,172 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:25,175 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:25,178 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:25,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:25,185 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:25,188 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,265 INFO L628 ElimStorePlain]: treesize reduction 67, result has 58.9 percent of original size [2021-06-05 21:59:25,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 21:59:25,266 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:332, output treesize:96 [2021-06-05 21:59:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:25,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003364437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:25,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:25,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:25,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714591747] [2021-06-05 21:59:25,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:25,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:25,375 INFO L87 Difference]: Start difference. First operand 483 states and 1514 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:25,901 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 21:59:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:26,385 INFO L93 Difference]: Finished difference Result 659 states and 1970 transitions. [2021-06-05 21:59:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:59:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:26,389 INFO L225 Difference]: With dead ends: 659 [2021-06-05 21:59:26,389 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 21:59:26,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 999.5ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 21:59:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 478. [2021-06-05 21:59:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1236897274633124) internal successors, (1490), 477 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1490 transitions. [2021-06-05 21:59:26,395 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1490 transitions. Word has length 19 [2021-06-05 21:59:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:26,395 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1490 transitions. [2021-06-05 21:59:26,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1490 transitions. [2021-06-05 21:59:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:26,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:26,395 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:26,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-06-05 21:59:26,596 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1600789196, now seen corresponding path program 51 times [2021-06-05 21:59:26,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:26,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85630850] [2021-06-05 21:59:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:26,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:26,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85630850] [2021-06-05 21:59:26,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85630850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:26,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535885628] [2021-06-05 21:59:26,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:26,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:59:26,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:26,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:26,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:26,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:26,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:26,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:26,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:26,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:27,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:27,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:27,009 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:27,012 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:27,016 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:27,019 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,078 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 21:59:27,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:27,079 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 21:59:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535885628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:27,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:27,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:27,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747880212] [2021-06-05 21:59:27,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:27,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:27,179 INFO L87 Difference]: Start difference. First operand 478 states and 1490 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:27,842 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 21:59:28,273 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-06-05 21:59:28,519 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-05 21:59:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:28,540 INFO L93 Difference]: Finished difference Result 841 states and 2433 transitions. [2021-06-05 21:59:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:28,541 INFO L225 Difference]: With dead ends: 841 [2021-06-05 21:59:28,541 INFO L226 Difference]: Without dead ends: 792 [2021-06-05 21:59:28,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1473.1ms TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:59:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-05 21:59:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 490. [2021-06-05 21:59:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-05 21:59:28,547 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-05 21:59:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:28,547 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-05 21:59:28,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-05 21:59:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:28,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:28,548 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:28,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:28,748 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:28,748 INFO L82 PathProgramCache]: Analyzing trace with hash 411566906, now seen corresponding path program 52 times [2021-06-05 21:59:28,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:28,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646063474] [2021-06-05 21:59:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:28,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:28,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646063474] [2021-06-05 21:59:28,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646063474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:28,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708399532] [2021-06-05 21:59:28,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:28,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:28,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:29,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:29,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:29,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:29,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:29,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:29,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:29,119 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:29,122 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:29,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:29,128 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:29,131 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:29,134 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,180 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:59:29,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:29,181 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:59:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:29,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708399532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:29,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:29,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:29,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552099544] [2021-06-05 21:59:29,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:29,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:29,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:29,271 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:30,189 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 21:59:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:30,223 INFO L93 Difference]: Finished difference Result 795 states and 2337 transitions. [2021-06-05 21:59:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:30,224 INFO L225 Difference]: With dead ends: 795 [2021-06-05 21:59:30,224 INFO L226 Difference]: Without dead ends: 765 [2021-06-05 21:59:30,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 994.8ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-06-05 21:59:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 493. [2021-06-05 21:59:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.144308943089431) internal successors, (1547), 492 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1547 transitions. [2021-06-05 21:59:30,230 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1547 transitions. Word has length 19 [2021-06-05 21:59:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:30,230 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1547 transitions. [2021-06-05 21:59:30,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1547 transitions. [2021-06-05 21:59:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:30,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:30,231 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:30,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:30,445 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1162967344, now seen corresponding path program 53 times [2021-06-05 21:59:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:30,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390103108] [2021-06-05 21:59:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:30,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:30,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390103108] [2021-06-05 21:59:30,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390103108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:30,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495731973] [2021-06-05 21:59:30,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:30,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:30,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:30,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:30,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:30,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:30,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:30,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:30,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:30,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:30,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:30,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:30,801 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:30,805 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:30,810 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:30,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:30,819 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:30,823 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:30,827 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:30,832 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:30,835 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:30,839 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:30,843 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:30,848 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:30,852 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:30,855 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:30,859 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:31,004 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 21:59:31,005 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 21:59:31,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:59:31,007 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 21:59:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:31,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495731973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:31,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:31,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:31,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390071364] [2021-06-05 21:59:31,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:31,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:31,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:31,191 INFO L87 Difference]: Start difference. First operand 493 states and 1547 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:31,757 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 21:59:31,888 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-06-05 21:59:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:32,043 INFO L93 Difference]: Finished difference Result 784 states and 2326 transitions. [2021-06-05 21:59:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:32,045 INFO L225 Difference]: With dead ends: 784 [2021-06-05 21:59:32,045 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 21:59:32,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 975.1ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 21:59:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 498. [2021-06-05 21:59:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.160965794768612) internal successors, (1571), 497 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1571 transitions. [2021-06-05 21:59:32,051 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1571 transitions. Word has length 19 [2021-06-05 21:59:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:32,051 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1571 transitions. [2021-06-05 21:59:32,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1571 transitions. [2021-06-05 21:59:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:32,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:32,052 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:32,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 21:59:32,255 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:32,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1839657552, now seen corresponding path program 54 times [2021-06-05 21:59:32,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:32,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730774792] [2021-06-05 21:59:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:32,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:32,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730774792] [2021-06-05 21:59:32,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730774792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:32,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736022816] [2021-06-05 21:59:32,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:32,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:32,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:32,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:32,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:32,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:32,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:32,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:32,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:32,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:32,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:32,635 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:32,639 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:32,642 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:32,646 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:32,650 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:32,654 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:32,657 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:32,661 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:32,664 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,809 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 21:59:32,810 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 21:59:32,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 21:59:32,811 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 21:59:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736022816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:33,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:33,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:33,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096337981] [2021-06-05 21:59:33,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:33,080 INFO L87 Difference]: Start difference. First operand 498 states and 1571 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:33,630 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 21:59:33,909 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 21:59:34,132 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 21:59:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:34,155 INFO L93 Difference]: Finished difference Result 776 states and 2291 transitions. [2021-06-05 21:59:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:59:34,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:34,156 INFO L225 Difference]: With dead ends: 776 [2021-06-05 21:59:34,156 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 21:59:34,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1283.7ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 21:59:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 495. [2021-06-05 21:59:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.1497975708502026) internal successors, (1556), 494 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1556 transitions. [2021-06-05 21:59:34,162 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1556 transitions. Word has length 19 [2021-06-05 21:59:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:34,162 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1556 transitions. [2021-06-05 21:59:34,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1556 transitions. [2021-06-05 21:59:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:34,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:34,163 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:34,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:34,363 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:34,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1233511390, now seen corresponding path program 55 times [2021-06-05 21:59:34,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:34,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130876785] [2021-06-05 21:59:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:34,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:34,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130876785] [2021-06-05 21:59:34,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130876785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:34,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28848759] [2021-06-05 21:59:34,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:34,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:34,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:34,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:34,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:34,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:34,746 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:34,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:34,753 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:34,756 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:34,759 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:34,762 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:34,765 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:34,768 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:34,770 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,844 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-05 21:59:34,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 21:59:34,845 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:369, output treesize:96 [2021-06-05 21:59:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:34,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28848759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:34,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:34,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:34,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731619384] [2021-06-05 21:59:34,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:34,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:34,967 INFO L87 Difference]: Start difference. First operand 495 states and 1556 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:35,447 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 21:59:35,587 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 21:59:35,754 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 21:59:35,911 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 21:59:36,038 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 21:59:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:36,078 INFO L93 Difference]: Finished difference Result 776 states and 2307 transitions. [2021-06-05 21:59:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:36,079 INFO L225 Difference]: With dead ends: 776 [2021-06-05 21:59:36,079 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 21:59:36,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1188.7ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 21:59:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 490. [2021-06-05 21:59:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-05 21:59:36,085 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-05 21:59:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:36,085 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-05 21:59:36,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-05 21:59:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:36,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:36,086 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:36,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-06-05 21:59:36,286 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1833437172, now seen corresponding path program 56 times [2021-06-05 21:59:36,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:36,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474840289] [2021-06-05 21:59:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:36,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:36,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474840289] [2021-06-05 21:59:36,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474840289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055828463] [2021-06-05 21:59:36,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:36,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:36,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:36,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:36,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:36,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:36,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:36,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:36,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,620 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 21:59:36,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:36,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 21:59:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:36,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055828463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:36,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:36,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577155856] [2021-06-05 21:59:36,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:36,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:36,671 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:37,510 INFO L93 Difference]: Finished difference Result 730 states and 2163 transitions. [2021-06-05 21:59:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:37,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:37,511 INFO L225 Difference]: With dead ends: 730 [2021-06-05 21:59:37,511 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 21:59:37,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 21:59:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 490. [2021-06-05 21:59:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-05 21:59:37,517 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-05 21:59:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:37,517 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-05 21:59:37,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-05 21:59:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:37,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:37,517 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:37,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 21:59:37,718 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:37,718 INFO L82 PathProgramCache]: Analyzing trace with hash -903319062, now seen corresponding path program 57 times [2021-06-05 21:59:37,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:37,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852026168] [2021-06-05 21:59:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:37,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:37,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852026168] [2021-06-05 21:59:37,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852026168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:37,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589440799] [2021-06-05 21:59:37,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:37,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:37,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:38,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:38,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:38,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:38,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:38,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:38,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:38,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:38,043 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:38,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:38,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,085 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-06-05 21:59:38,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:38,086 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:240, output treesize:43 [2021-06-05 21:59:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:38,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589440799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:38,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:38,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685815886] [2021-06-05 21:59:38,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:38,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:38,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:38,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:38,144 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:38,594 INFO L93 Difference]: Finished difference Result 714 states and 2115 transitions. [2021-06-05 21:59:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:38,595 INFO L225 Difference]: With dead ends: 714 [2021-06-05 21:59:38,595 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 21:59:38,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 21:59:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 493. [2021-06-05 21:59:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.130081300813008) internal successors, (1540), 492 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1540 transitions. [2021-06-05 21:59:38,601 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1540 transitions. Word has length 19 [2021-06-05 21:59:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:38,601 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1540 transitions. [2021-06-05 21:59:38,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1540 transitions. [2021-06-05 21:59:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:38,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:38,601 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:38,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-05 21:59:38,802 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1951209916, now seen corresponding path program 58 times [2021-06-05 21:59:38,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:38,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643365369] [2021-06-05 21:59:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:38,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:38,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643365369] [2021-06-05 21:59:38,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643365369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918548416] [2021-06-05 21:59:38,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:38,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:38,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:38,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:38,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:39,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:39,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:39,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:39,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:39,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:39,097 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:39,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:39,104 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:39,107 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:39,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:39,119 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:39,122 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:39,125 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,185 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 21:59:39,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:39,186 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 21:59:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:39,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918548416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:39,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:39,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:39,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991738890] [2021-06-05 21:59:39,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:39,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:39,282 INFO L87 Difference]: Start difference. First operand 493 states and 1540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:39,857 INFO L93 Difference]: Finished difference Result 738 states and 2163 transitions. [2021-06-05 21:59:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:39,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:39,858 INFO L225 Difference]: With dead ends: 738 [2021-06-05 21:59:39,858 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 21:59:39,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 21:59:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 493. [2021-06-05 21:59:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.130081300813008) internal successors, (1540), 492 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1540 transitions. [2021-06-05 21:59:39,864 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1540 transitions. Word has length 19 [2021-06-05 21:59:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:39,864 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1540 transitions. [2021-06-05 21:59:39,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1540 transitions. [2021-06-05 21:59:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:39,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:39,864 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:40,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1159,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:40,065 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash -194960844, now seen corresponding path program 59 times [2021-06-05 21:59:40,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:40,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429076447] [2021-06-05 21:59:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:40,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:40,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429076447] [2021-06-05 21:59:40,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429076447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:40,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295939583] [2021-06-05 21:59:40,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:40,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:40,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:40,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:40,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:40,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 21:59:40,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:40,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:40,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:40,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:40,360 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:40,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:40,367 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:40,423 INFO L628 ElimStorePlain]: treesize reduction 52, result has 53.2 percent of original size [2021-06-05 21:59:40,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:40,424 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:307, output treesize:59 [2021-06-05 21:59:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:40,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295939583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:40,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:40,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 21:59:40,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038581583] [2021-06-05 21:59:40,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:59:40,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:40,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:59:40,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:59:40,508 INFO L87 Difference]: Start difference. First operand 493 states and 1540 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:40,928 INFO L93 Difference]: Finished difference Result 705 states and 2093 transitions. [2021-06-05 21:59:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:40,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:40,929 INFO L225 Difference]: With dead ends: 705 [2021-06-05 21:59:40,929 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 21:59:40,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 21:59:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 496. [2021-06-05 21:59:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.1333333333333333) internal successors, (1551), 495 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1551 transitions. [2021-06-05 21:59:40,934 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1551 transitions. Word has length 19 [2021-06-05 21:59:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:40,935 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1551 transitions. [2021-06-05 21:59:40,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1551 transitions. [2021-06-05 21:59:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:40,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:40,935 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:41,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:41,136 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1920214934, now seen corresponding path program 60 times [2021-06-05 21:59:41,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:41,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257723987] [2021-06-05 21:59:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:41,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:41,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257723987] [2021-06-05 21:59:41,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257723987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:41,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304515315] [2021-06-05 21:59:41,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:41,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:59:41,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:41,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:41,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:41,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:41,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:41,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:41,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:41,468 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:41,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,503 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 21:59:41,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:41,504 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 21:59:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:41,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304515315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:41,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:41,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:41,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674016118] [2021-06-05 21:59:41,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:41,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:41,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:41,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:41,556 INFO L87 Difference]: Start difference. First operand 496 states and 1551 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:42,137 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-06-05 21:59:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:42,635 INFO L93 Difference]: Finished difference Result 975 states and 2783 transitions. [2021-06-05 21:59:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:42,636 INFO L225 Difference]: With dead ends: 975 [2021-06-05 21:59:42,636 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 21:59:42,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1110.7ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:42,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 21:59:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 502. [2021-06-05 21:59:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.143712574850299) internal successors, (1575), 501 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1575 transitions. [2021-06-05 21:59:42,643 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1575 transitions. Word has length 19 [2021-06-05 21:59:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:42,643 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1575 transitions. [2021-06-05 21:59:42,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1575 transitions. [2021-06-05 21:59:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:42,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:42,644 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:42,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:42,844 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1459737962, now seen corresponding path program 61 times [2021-06-05 21:59:42,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:42,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120427870] [2021-06-05 21:59:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:42,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:42,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120427870] [2021-06-05 21:59:42,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120427870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:42,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125927909] [2021-06-05 21:59:42,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:43,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:43,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:43,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:43,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:43,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:43,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:43,231 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 21:59:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:43,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125927909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:43,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:43,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:43,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731198907] [2021-06-05 21:59:43,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:43,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:43,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:43,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:43,280 INFO L87 Difference]: Start difference. First operand 502 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:43,697 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 21:59:43,885 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 21:59:44,194 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 21:59:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:44,211 INFO L93 Difference]: Finished difference Result 843 states and 2462 transitions. [2021-06-05 21:59:44,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:59:44,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:44,212 INFO L225 Difference]: With dead ends: 843 [2021-06-05 21:59:44,212 INFO L226 Difference]: Without dead ends: 814 [2021-06-05 21:59:44,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1015.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-06-05 21:59:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 502. [2021-06-05 21:59:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.143712574850299) internal successors, (1575), 501 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1575 transitions. [2021-06-05 21:59:44,218 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1575 transitions. Word has length 19 [2021-06-05 21:59:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:44,218 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1575 transitions. [2021-06-05 21:59:44,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1575 transitions. [2021-06-05 21:59:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:44,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:44,219 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:44,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1204,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:44,419 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash 692891814, now seen corresponding path program 62 times [2021-06-05 21:59:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:44,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121605509] [2021-06-05 21:59:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:44,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121605509] [2021-06-05 21:59:44,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121605509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55282435] [2021-06-05 21:59:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:44,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:44,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:44,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:44,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:44,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:44,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:44,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:44,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:44,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:44,763 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:44,766 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:44,769 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:44,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:44,776 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:44,779 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:44,782 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,857 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-06-05 21:59:44,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 21:59:44,858 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-06-05 21:59:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:44,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55282435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:44,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:44,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:44,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045304230] [2021-06-05 21:59:44,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:44,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:44,970 INFO L87 Difference]: Start difference. First operand 502 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:45,552 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-05 21:59:45,712 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 21:59:45,922 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 21:59:46,234 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 21:59:46,386 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 21:59:46,557 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 21:59:46,703 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-05 21:59:46,845 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 21:59:46,971 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 21:59:47,162 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-05 21:59:47,421 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 21:59:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:47,435 INFO L93 Difference]: Finished difference Result 990 states and 2847 transitions. [2021-06-05 21:59:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:59:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:47,436 INFO L225 Difference]: With dead ends: 990 [2021-06-05 21:59:47,436 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 21:59:47,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2376.5ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:59:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 21:59:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 501. [2021-06-05 21:59:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.152) internal successors, (1576), 500 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1576 transitions. [2021-06-05 21:59:47,443 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1576 transitions. Word has length 19 [2021-06-05 21:59:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:47,443 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1576 transitions. [2021-06-05 21:59:47,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1576 transitions. [2021-06-05 21:59:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:47,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:47,444 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:47,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:47,644 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash 168702634, now seen corresponding path program 63 times [2021-06-05 21:59:47,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:47,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067695005] [2021-06-05 21:59:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:47,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:47,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067695005] [2021-06-05 21:59:47,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067695005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:47,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55185740] [2021-06-05 21:59:47,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:47,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:47,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:47,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:48,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:48,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:48,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:48,010 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:48,012 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:48,044 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 21:59:48,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:48,045 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-05 21:59:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:48,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55185740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:48,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:48,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:48,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161854734] [2021-06-05 21:59:48,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:48,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:48,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:48,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:48,098 INFO L87 Difference]: Start difference. First operand 501 states and 1576 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:48,941 INFO L93 Difference]: Finished difference Result 879 states and 2585 transitions. [2021-06-05 21:59:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:59:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:48,942 INFO L225 Difference]: With dead ends: 879 [2021-06-05 21:59:48,942 INFO L226 Difference]: Without dead ends: 850 [2021-06-05 21:59:48,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 836.8ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-05 21:59:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 501. [2021-06-05 21:59:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.152) internal successors, (1576), 500 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1576 transitions. [2021-06-05 21:59:48,948 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1576 transitions. Word has length 19 [2021-06-05 21:59:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:48,948 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1576 transitions. [2021-06-05 21:59:48,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1576 transitions. [2021-06-05 21:59:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:48,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:48,949 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:49,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1232 [2021-06-05 21:59:49,149 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2074185700, now seen corresponding path program 64 times [2021-06-05 21:59:49,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:49,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408398512] [2021-06-05 21:59:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:49,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:49,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408398512] [2021-06-05 21:59:49,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408398512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:49,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944270952] [2021-06-05 21:59:49,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:49,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:49,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:49,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:49,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:49,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:49,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:49,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:49,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 21:59:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:49,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944270952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:49,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:49,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:49,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222438689] [2021-06-05 21:59:49,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:49,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:49,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:49,516 INFO L87 Difference]: Start difference. First operand 501 states and 1576 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:50,023 INFO L93 Difference]: Finished difference Result 766 states and 2250 transitions. [2021-06-05 21:59:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:50,023 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:50,024 INFO L225 Difference]: With dead ends: 766 [2021-06-05 21:59:50,024 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 21:59:50,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 521.8ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:50,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 21:59:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 505. [2021-06-05 21:59:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1547619047619047) internal successors, (1590), 504 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1590 transitions. [2021-06-05 21:59:50,030 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1590 transitions. Word has length 19 [2021-06-05 21:59:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:50,030 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1590 transitions. [2021-06-05 21:59:50,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1590 transitions. [2021-06-05 21:59:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:50,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:50,031 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:50,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-05 21:59:50,231 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:50,231 INFO L82 PathProgramCache]: Analyzing trace with hash 780343278, now seen corresponding path program 65 times [2021-06-05 21:59:50,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:50,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426853506] [2021-06-05 21:59:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:50,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:50,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426853506] [2021-06-05 21:59:50,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426853506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:50,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904110098] [2021-06-05 21:59:50,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:50,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:50,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:50,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:50,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:50,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:50,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:50,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:50,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:50,546 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:50,549 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:50,552 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:50,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:50,558 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,609 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:59:50,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:50,610 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:59:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:50,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904110098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:50,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:50,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:50,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982360423] [2021-06-05 21:59:50,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:50,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:50,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:50,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:50,697 INFO L87 Difference]: Start difference. First operand 505 states and 1590 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:51,294 INFO L93 Difference]: Finished difference Result 799 states and 2337 transitions. [2021-06-05 21:59:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:51,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:51,295 INFO L225 Difference]: With dead ends: 799 [2021-06-05 21:59:51,296 INFO L226 Difference]: Without dead ends: 755 [2021-06-05 21:59:51,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 628.5ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-05 21:59:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 505. [2021-06-05 21:59:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1547619047619047) internal successors, (1590), 504 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1590 transitions. [2021-06-05 21:59:51,302 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1590 transitions. Word has length 19 [2021-06-05 21:59:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:51,302 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1590 transitions. [2021-06-05 21:59:51,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1590 transitions. [2021-06-05 21:59:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:51,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:51,303 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:51,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 21:59:51,503 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1365827482, now seen corresponding path program 66 times [2021-06-05 21:59:51,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:51,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596927913] [2021-06-05 21:59:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:51,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:51,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596927913] [2021-06-05 21:59:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596927913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:51,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138207193] [2021-06-05 21:59:51,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:51,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:51,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:51,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:51,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:51,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:51,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:51,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:51,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:51,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:51,811 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:51,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:51,823 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:51,826 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:51,829 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:51,831 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,877 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:59:51,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:51,878 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 21:59:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:51,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138207193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:51,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:51,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:59:51,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709027259] [2021-06-05 21:59:51,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:59:51,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:59:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:59:51,968 INFO L87 Difference]: Start difference. First operand 505 states and 1590 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:52,497 INFO L93 Difference]: Finished difference Result 700 states and 2119 transitions. [2021-06-05 21:59:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:59:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:52,498 INFO L225 Difference]: With dead ends: 700 [2021-06-05 21:59:52,498 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 21:59:52,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 21:59:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 508. [2021-06-05 21:59:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.157790927021696) internal successors, (1601), 507 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1601 transitions. [2021-06-05 21:59:52,504 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1601 transitions. Word has length 19 [2021-06-05 21:59:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:52,504 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1601 transitions. [2021-06-05 21:59:52,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1601 transitions. [2021-06-05 21:59:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:52,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:52,505 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:52,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:52,720 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash -255608602, now seen corresponding path program 67 times [2021-06-05 21:59:52,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:52,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273591973] [2021-06-05 21:59:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:52,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:52,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273591973] [2021-06-05 21:59:52,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273591973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:52,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189397679] [2021-06-05 21:59:52,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:52,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:53,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:53,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:53,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:53,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:53,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:53,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:53,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 21:59:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:53,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189397679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:53,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:53,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:53,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223156635] [2021-06-05 21:59:53,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:53,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:53,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:53,152 INFO L87 Difference]: Start difference. First operand 508 states and 1601 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:53,548 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 21:59:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:53,781 INFO L93 Difference]: Finished difference Result 827 states and 2411 transitions. [2021-06-05 21:59:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:59:53,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:53,782 INFO L225 Difference]: With dead ends: 827 [2021-06-05 21:59:53,782 INFO L226 Difference]: Without dead ends: 798 [2021-06-05 21:59:53,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-05 21:59:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 509. [2021-06-05 21:59:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.1633858267716537) internal successors, (1607), 508 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1607 transitions. [2021-06-05 21:59:53,788 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1607 transitions. Word has length 19 [2021-06-05 21:59:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:53,789 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1607 transitions. [2021-06-05 21:59:53,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1607 transitions. [2021-06-05 21:59:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:53,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:53,789 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:53,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1288 [2021-06-05 21:59:53,990 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:53,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:53,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1696046920, now seen corresponding path program 68 times [2021-06-05 21:59:53,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:53,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895771905] [2021-06-05 21:59:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:54,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:54,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895771905] [2021-06-05 21:59:54,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895771905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:54,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557788536] [2021-06-05 21:59:54,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:54,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:54,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:54,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:54,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:54,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:54,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:54,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:54,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:54,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:54,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:54,346 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:54,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,394 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 21:59:54,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 21:59:54,395 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-05 21:59:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:54,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557788536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:54,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:54,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:54,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931023163] [2021-06-05 21:59:54,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:54,499 INFO L87 Difference]: Start difference. First operand 509 states and 1607 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:55,364 INFO L93 Difference]: Finished difference Result 891 states and 2568 transitions. [2021-06-05 21:59:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:55,365 INFO L225 Difference]: With dead ends: 891 [2021-06-05 21:59:55,365 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 21:59:55,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 21:59:55,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 511. [2021-06-05 21:59:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.168627450980392) internal successors, (1616), 510 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1616 transitions. [2021-06-05 21:59:55,371 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1616 transitions. Word has length 19 [2021-06-05 21:59:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:55,371 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1616 transitions. [2021-06-05 21:59:55,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1616 transitions. [2021-06-05 21:59:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:55,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:55,372 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:55,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1300 [2021-06-05 21:59:55,572 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash 927157478, now seen corresponding path program 69 times [2021-06-05 21:59:55,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:55,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993787722] [2021-06-05 21:59:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:55,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:55,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993787722] [2021-06-05 21:59:55,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993787722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:55,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592552045] [2021-06-05 21:59:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:55,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:59:55,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:55,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:55,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:55,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:55,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:55,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:55,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:55,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:55,958 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:59:55,962 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 21:59:55,965 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 21:59:55,968 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:55,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:55,971 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:56,043 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-05 21:59:56,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 21:59:56,044 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-05 21:59:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:56,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592552045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:56,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:56,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:56,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437160632] [2021-06-05 21:59:56,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:56,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:56,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:56,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:56,157 INFO L87 Difference]: Start difference. First operand 511 states and 1616 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:56,751 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 21:59:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:57,458 INFO L93 Difference]: Finished difference Result 942 states and 2693 transitions. [2021-06-05 21:59:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:59:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:57,459 INFO L225 Difference]: With dead ends: 942 [2021-06-05 21:59:57,459 INFO L226 Difference]: Without dead ends: 898 [2021-06-05 21:59:57,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1293.3ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:59:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-05 21:59:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 509. [2021-06-05 21:59:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.1633858267716537) internal successors, (1607), 508 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1607 transitions. [2021-06-05 21:59:57,466 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1607 transitions. Word has length 19 [2021-06-05 21:59:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:57,466 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1607 transitions. [2021-06-05 21:59:57,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1607 transitions. [2021-06-05 21:59:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:57,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:57,467 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:57,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1319 [2021-06-05 21:59:57,681 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1788432346, now seen corresponding path program 70 times [2021-06-05 21:59:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:57,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538191822] [2021-06-05 21:59:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:57,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:57,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538191822] [2021-06-05 21:59:57,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538191822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:57,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708627287] [2021-06-05 21:59:57,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:57,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:57,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 21:59:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:58,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:58,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:58,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:58,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:58,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:58,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:58,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:58,034 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 21:59:58,038 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 21:59:58,042 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:58,046 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:58,049 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 21:59:58,053 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:58,057 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 21:59:58,060 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,241 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 21:59:58,241 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-06-05 21:59:58,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 21:59:58,244 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-06-05 21:59:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:58,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708627287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:58,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:58,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:59:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104623776] [2021-06-05 21:59:58,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:59:58,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:58,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:59:58,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:59:58,470 INFO L87 Difference]: Start difference. First operand 509 states and 1607 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:58,859 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 21:59:59,549 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 21:59:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:59,568 INFO L93 Difference]: Finished difference Result 993 states and 2820 transitions. [2021-06-05 21:59:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:59,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:59:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:59,570 INFO L225 Difference]: With dead ends: 993 [2021-06-05 21:59:59,570 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 21:59:59,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1195.4ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 21:59:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 515. [2021-06-05 21:59:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.184824902723735) internal successors, (1637), 514 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1637 transitions. [2021-06-05 21:59:59,577 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1637 transitions. Word has length 19 [2021-06-05 21:59:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:59,577 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1637 transitions. [2021-06-05 21:59:59,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1637 transitions. [2021-06-05 21:59:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:59:59,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:59,577 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:59,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-05 21:59:59,778 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash -496089946, now seen corresponding path program 71 times [2021-06-05 21:59:59,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:59,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115978555] [2021-06-05 21:59:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:59,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:59,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115978555] [2021-06-05 21:59:59,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115978555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:59,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105123064] [2021-06-05 21:59:59,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:59,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:59,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:59,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:00,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:00,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:00,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:00,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:00,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:00,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:00,126 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:00,130 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:00,133 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:00,137 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:00,140 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:00,144 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:00,147 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:00,151 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:00,154 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:00,158 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:00,161 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,300 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 22:00:00,300 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 22:00:00,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:00:00,302 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 22:00:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:00,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105123064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:00,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:00,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:00,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820718798] [2021-06-05 22:00:00,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:00,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:00,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:00,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:00,540 INFO L87 Difference]: Start difference. First operand 515 states and 1637 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:00,970 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 22:00:01,172 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 22:00:01,376 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 22:00:01,555 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 22:00:01,707 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 22:00:02,046 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 22:00:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:02,343 INFO L93 Difference]: Finished difference Result 981 states and 2784 transitions. [2021-06-05 22:00:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:02,345 INFO L225 Difference]: With dead ends: 981 [2021-06-05 22:00:02,345 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 22:00:02,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1804.6ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:00:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 22:00:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 515. [2021-06-05 22:00:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.184824902723735) internal successors, (1637), 514 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1637 transitions. [2021-06-05 22:00:02,352 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1637 transitions. Word has length 19 [2021-06-05 22:00:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:02,352 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1637 transitions. [2021-06-05 22:00:02,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1637 transitions. [2021-06-05 22:00:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:02,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:02,353 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:02,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1356,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:02,561 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:02,561 INFO L82 PathProgramCache]: Analyzing trace with hash 65191608, now seen corresponding path program 72 times [2021-06-05 22:00:02,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:02,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448562559] [2021-06-05 22:00:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:02,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:02,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448562559] [2021-06-05 22:00:02,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448562559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:02,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315918695] [2021-06-05 22:00:02,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:02,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:02,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:02,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:02,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:02,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:02,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:02,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:02,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:02,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:02,962 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:02,965 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:02,968 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:02,971 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:02,974 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:02,977 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:02,984 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:03,050 INFO L628 ElimStorePlain]: treesize reduction 77, result has 44.2 percent of original size [2021-06-05 22:00:03,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:03,051 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:397, output treesize:61 [2021-06-05 22:00:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:03,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315918695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:03,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:03,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:00:03,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154239965] [2021-06-05 22:00:03,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:00:03,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:03,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:00:03,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:03,142 INFO L87 Difference]: Start difference. First operand 515 states and 1637 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:03,508 INFO L93 Difference]: Finished difference Result 732 states and 2210 transitions. [2021-06-05 22:00:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:03,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:03,510 INFO L225 Difference]: With dead ends: 732 [2021-06-05 22:00:03,510 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 22:00:03,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:00:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 22:00:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 519. [2021-06-05 22:00:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.193050193050193) internal successors, (1654), 518 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1654 transitions. [2021-06-05 22:00:03,515 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1654 transitions. Word has length 19 [2021-06-05 22:00:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:03,515 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1654 transitions. [2021-06-05 22:00:03,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1654 transitions. [2021-06-05 22:00:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:03,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:03,516 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:03,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-06-05 22:00:03,717 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:03,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1428716114, now seen corresponding path program 73 times [2021-06-05 22:00:03,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:03,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605923954] [2021-06-05 22:00:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:03,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:03,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605923954] [2021-06-05 22:00:03,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605923954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:03,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846453986] [2021-06-05 22:00:03,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:03,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:04,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:04,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:04,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:04,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:04,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:04,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:04,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:04,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:04,083 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 22:00:04,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:04,084 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 22:00:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:04,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846453986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:04,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:04,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:00:04,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111301934] [2021-06-05 22:00:04,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:00:04,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:04,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:00:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:04,140 INFO L87 Difference]: Start difference. First operand 519 states and 1654 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:04,591 INFO L93 Difference]: Finished difference Result 721 states and 2190 transitions. [2021-06-05 22:00:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:00:04,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:04,593 INFO L225 Difference]: With dead ends: 721 [2021-06-05 22:00:04,593 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 22:00:04,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:00:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 22:00:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 518. [2021-06-05 22:00:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 3.195357833655706) internal successors, (1652), 517 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1652 transitions. [2021-06-05 22:00:04,599 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1652 transitions. Word has length 19 [2021-06-05 22:00:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:04,599 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1652 transitions. [2021-06-05 22:00:04,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1652 transitions. [2021-06-05 22:00:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:04,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:04,599 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:04,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-06-05 22:00:04,815 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash 816592046, now seen corresponding path program 74 times [2021-06-05 22:00:04,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:04,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331117635] [2021-06-05 22:00:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:04,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:04,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331117635] [2021-06-05 22:00:04,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331117635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:04,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822647200] [2021-06-05 22:00:04,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:05,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:05,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:05,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:05,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:05,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:05,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:05,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:05,155 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:05,159 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:05,162 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:05,166 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:05,169 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:05,173 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:05,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:05,180 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:05,184 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:05,187 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:05,192 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,352 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 22:00:05,352 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 22:00:05,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:00:05,354 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 22:00:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:05,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822647200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:05,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:05,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:05,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298860339] [2021-06-05 22:00:05,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:05,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:05,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:05,535 INFO L87 Difference]: Start difference. First operand 518 states and 1652 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:06,438 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 22:00:06,985 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 22:00:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:06,994 INFO L93 Difference]: Finished difference Result 919 states and 2686 transitions. [2021-06-05 22:00:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:00:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:06,995 INFO L225 Difference]: With dead ends: 919 [2021-06-05 22:00:06,995 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 22:00:06,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1470.6ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 22:00:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 523. [2021-06-05 22:00:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 3.210727969348659) internal successors, (1676), 522 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1676 transitions. [2021-06-05 22:00:07,002 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1676 transitions. Word has length 19 [2021-06-05 22:00:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:07,002 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1676 transitions. [2021-06-05 22:00:07,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1676 transitions. [2021-06-05 22:00:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:07,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:07,003 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:07,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-06-05 22:00:07,204 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash 2108934446, now seen corresponding path program 75 times [2021-06-05 22:00:07,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:07,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902255086] [2021-06-05 22:00:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:07,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:07,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902255086] [2021-06-05 22:00:07,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902255086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:07,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190711396] [2021-06-05 22:00:07,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:07,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:07,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:07,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:07,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:07,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:07,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:07,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:07,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:07,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:07,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:07,555 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:07,559 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:07,562 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:07,566 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:07,570 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:07,573 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:07,577 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:07,580 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:07,584 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:07,587 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,733 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 22:00:07,733 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 22:00:07,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:00:07,735 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 22:00:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:07,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190711396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:07,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:07,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:07,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746820419] [2021-06-05 22:00:07,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:07,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:07,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:07,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:07,951 INFO L87 Difference]: Start difference. First operand 523 states and 1676 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:08,715 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 22:00:08,930 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-06-05 22:00:09,069 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 22:00:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:09,235 INFO L93 Difference]: Finished difference Result 897 states and 2621 transitions. [2021-06-05 22:00:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:00:09,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:09,236 INFO L225 Difference]: With dead ends: 897 [2021-06-05 22:00:09,236 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 22:00:09,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1394.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:09,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 22:00:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 516. [2021-06-05 22:00:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.1902912621359225) internal successors, (1643), 515 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1643 transitions. [2021-06-05 22:00:09,242 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1643 transitions. Word has length 19 [2021-06-05 22:00:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:09,242 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1643 transitions. [2021-06-05 22:00:09,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1643 transitions. [2021-06-05 22:00:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:09,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:09,243 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:09,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-05 22:00:09,444 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1568513078, now seen corresponding path program 76 times [2021-06-05 22:00:09,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:09,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916736849] [2021-06-05 22:00:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:09,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:09,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916736849] [2021-06-05 22:00:09,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916736849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:09,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006401206] [2021-06-05 22:00:09,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:09,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:09,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:09,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:09,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:09,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:09,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:09,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:09,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:09,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:09,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:09,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:09,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:09,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:09,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:09,846 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:114, output treesize:35 [2021-06-05 22:00:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:09,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006401206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:09,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:09,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:00:09,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820547326] [2021-06-05 22:00:09,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:00:09,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:00:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:00:09,898 INFO L87 Difference]: Start difference. First operand 516 states and 1643 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:10,287 INFO L93 Difference]: Finished difference Result 913 states and 2714 transitions. [2021-06-05 22:00:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:10,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:10,289 INFO L225 Difference]: With dead ends: 913 [2021-06-05 22:00:10,289 INFO L226 Difference]: Without dead ends: 873 [2021-06-05 22:00:10,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:00:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-05 22:00:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 525. [2021-06-05 22:00:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.1946564885496183) internal successors, (1674), 524 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1674 transitions. [2021-06-05 22:00:10,295 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1674 transitions. Word has length 19 [2021-06-05 22:00:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:10,295 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1674 transitions. [2021-06-05 22:00:10,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1674 transitions. [2021-06-05 22:00:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:10,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:10,296 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:10,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1453 [2021-06-05 22:00:10,496 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2032632552, now seen corresponding path program 77 times [2021-06-05 22:00:10,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:10,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459282368] [2021-06-05 22:00:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:10,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:10,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459282368] [2021-06-05 22:00:10,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459282368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:10,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64447740] [2021-06-05 22:00:10,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:10,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:10,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:10,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:10,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:10,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:10,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:10,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:10,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:10,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:10,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:10,880 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-06-05 22:00:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64447740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:10,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:10,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:10,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777873323] [2021-06-05 22:00:10,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:10,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:10,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:10,926 INFO L87 Difference]: Start difference. First operand 525 states and 1674 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:11,287 INFO L93 Difference]: Finished difference Result 881 states and 2649 transitions. [2021-06-05 22:00:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:11,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:11,288 INFO L225 Difference]: With dead ends: 881 [2021-06-05 22:00:11,288 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 22:00:11,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 515.6ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:00:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 22:00:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 525. [2021-06-05 22:00:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.1946564885496183) internal successors, (1674), 524 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1674 transitions. [2021-06-05 22:00:11,294 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1674 transitions. Word has length 19 [2021-06-05 22:00:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:11,295 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1674 transitions. [2021-06-05 22:00:11,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1674 transitions. [2021-06-05 22:00:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:11,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:11,295 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:11,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 22:00:11,509 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash 592194234, now seen corresponding path program 78 times [2021-06-05 22:00:11,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:11,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448215162] [2021-06-05 22:00:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:11,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:11,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448215162] [2021-06-05 22:00:11,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448215162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:11,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295775484] [2021-06-05 22:00:11,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:11,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:11,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:11,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:11,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:11,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:11,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:11,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:11,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:11,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:11,917 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:11,921 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:11,925 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:11,928 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:11,931 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:11,935 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,997 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 22:00:11,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:11,998 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 22:00:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:12,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295775484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:12,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:12,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:12,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082007901] [2021-06-05 22:00:12,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:12,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:12,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:12,101 INFO L87 Difference]: Start difference. First operand 525 states and 1674 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:12,664 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-05 22:00:13,013 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 22:00:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:13,044 INFO L93 Difference]: Finished difference Result 945 states and 2800 transitions. [2021-06-05 22:00:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:13,045 INFO L225 Difference]: With dead ends: 945 [2021-06-05 22:00:13,045 INFO L226 Difference]: Without dead ends: 895 [2021-06-05 22:00:13,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1038.2ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:13,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-06-05 22:00:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 533. [2021-06-05 22:00:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 3.191729323308271) internal successors, (1698), 532 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1698 transitions. [2021-06-05 22:00:13,052 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1698 transitions. Word has length 19 [2021-06-05 22:00:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:13,052 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1698 transitions. [2021-06-05 22:00:13,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1698 transitions. [2021-06-05 22:00:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:13,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:13,053 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:13,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1472,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:13,253 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash 653498678, now seen corresponding path program 79 times [2021-06-05 22:00:13,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:13,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584453406] [2021-06-05 22:00:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:13,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584453406] [2021-06-05 22:00:13,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584453406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437372696] [2021-06-05 22:00:13,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:13,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:13,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:13,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:13,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:13,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:13,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:13,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:13,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:13,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:13,712 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:77, output treesize:35 [2021-06-05 22:00:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:13,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437372696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:13,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:13,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:13,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985366130] [2021-06-05 22:00:13,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:13,777 INFO L87 Difference]: Start difference. First operand 533 states and 1698 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:14,374 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 22:00:14,529 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 22:00:14,831 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-06-05 22:00:15,041 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-05 22:00:15,306 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 22:00:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:15,327 INFO L93 Difference]: Finished difference Result 964 states and 2848 transitions. [2021-06-05 22:00:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:15,329 INFO L225 Difference]: With dead ends: 964 [2021-06-05 22:00:15,329 INFO L226 Difference]: Without dead ends: 935 [2021-06-05 22:00:15,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1605.2ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:00:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-05 22:00:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 537. [2021-06-05 22:00:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-06-05 22:00:15,336 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 19 [2021-06-05 22:00:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:15,336 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-06-05 22:00:15,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-06-05 22:00:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:15,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:15,337 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:15,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1488,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:15,537 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash -113347470, now seen corresponding path program 80 times [2021-06-05 22:00:15,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:15,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378540599] [2021-06-05 22:00:15,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:15,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:15,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378540599] [2021-06-05 22:00:15,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378540599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:15,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809601570] [2021-06-05 22:00:15,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:15,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:15,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:15,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:15,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:15,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:15,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:15,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:15,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:15,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:15,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:15,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:15,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:15,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:15,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:15,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:15,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:16,062 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 22:00:16,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:00:16,063 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-05 22:00:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:16,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809601570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:16,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:16,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:00:16,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762296689] [2021-06-05 22:00:16,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:00:16,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:16,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:00:16,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:16,172 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:16,573 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 22:00:16,703 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-05 22:00:16,986 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 22:00:17,432 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 22:00:17,838 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 22:00:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:18,077 INFO L93 Difference]: Finished difference Result 1149 states and 3281 transitions. [2021-06-05 22:00:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:18,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:18,079 INFO L225 Difference]: With dead ends: 1149 [2021-06-05 22:00:18,079 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 22:00:18,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1942.8ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 22:00:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 590. [2021-06-05 22:00:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.191850594227504) internal successors, (1880), 589 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1880 transitions. [2021-06-05 22:00:18,087 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1880 transitions. Word has length 19 [2021-06-05 22:00:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:18,087 INFO L482 AbstractCegarLoop]: Abstraction has 590 states and 1880 transitions. [2021-06-05 22:00:18,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1880 transitions. [2021-06-05 22:00:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:18,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:18,087 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:18,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1500 [2021-06-05 22:00:18,288 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:18,288 INFO L82 PathProgramCache]: Analyzing trace with hash -637536650, now seen corresponding path program 81 times [2021-06-05 22:00:18,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:18,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211741156] [2021-06-05 22:00:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:18,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:18,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211741156] [2021-06-05 22:00:18,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211741156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:18,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666926867] [2021-06-05 22:00:18,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:18,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:18,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:18,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:18,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:18,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:18,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:18,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:18,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:18,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:18,829 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 22:00:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:18,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666926867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:18,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:18,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:18,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522766611] [2021-06-05 22:00:18,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:18,880 INFO L87 Difference]: Start difference. First operand 590 states and 1880 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:19,582 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 22:00:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:19,603 INFO L93 Difference]: Finished difference Result 963 states and 2889 transitions. [2021-06-05 22:00:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:19,604 INFO L225 Difference]: With dead ends: 963 [2021-06-05 22:00:19,605 INFO L226 Difference]: Without dead ends: 934 [2021-06-05 22:00:19,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 939.8ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:00:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-06-05 22:00:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 591. [2021-06-05 22:00:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1966101694915254) internal successors, (1886), 590 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1886 transitions. [2021-06-05 22:00:19,612 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1886 transitions. Word has length 19 [2021-06-05 22:00:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:19,612 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1886 transitions. [2021-06-05 22:00:19,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1886 transitions. [2021-06-05 22:00:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:19,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:19,613 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:19,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:19,813 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:19,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2077974968, now seen corresponding path program 82 times [2021-06-05 22:00:19,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:19,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826117114] [2021-06-05 22:00:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:19,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826117114] [2021-06-05 22:00:19,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826117114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388301921] [2021-06-05 22:00:19,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:20,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:20,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:20,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:20,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:20,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:20,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:20,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:20,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:20,245 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:20,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:20,251 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:20,255 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:20,258 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:20,261 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,326 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-05 22:00:20,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:20,327 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 22:00:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:20,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388301921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:20,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:20,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:20,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959178846] [2021-06-05 22:00:20,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:20,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:20,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:20,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:20,433 INFO L87 Difference]: Start difference. First operand 591 states and 1886 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:21,086 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 22:00:21,320 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-05 22:00:21,459 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 22:00:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:21,493 INFO L93 Difference]: Finished difference Result 1034 states and 3055 transitions. [2021-06-05 22:00:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:21,495 INFO L225 Difference]: With dead ends: 1034 [2021-06-05 22:00:21,495 INFO L226 Difference]: Without dead ends: 984 [2021-06-05 22:00:21,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1171.5ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-06-05 22:00:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 593. [2021-06-05 22:00:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2010135135135136) internal successors, (1895), 592 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1895 transitions. [2021-06-05 22:00:21,502 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1895 transitions. Word has length 19 [2021-06-05 22:00:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:21,502 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1895 transitions. [2021-06-05 22:00:21,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1895 transitions. [2021-06-05 22:00:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:21,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:21,503 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:21,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1524 [2021-06-05 22:00:21,703 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:21,704 INFO L82 PathProgramCache]: Analyzing trace with hash 545229430, now seen corresponding path program 83 times [2021-06-05 22:00:21,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:21,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944376788] [2021-06-05 22:00:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:21,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:21,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944376788] [2021-06-05 22:00:21,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944376788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:21,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313498358] [2021-06-05 22:00:21,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:22,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:22,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:22,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:22,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:22,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:22,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:22,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:22,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:22,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:22,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:22,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:22,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:22,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:22,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:22,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:22,288 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 22:00:22,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:22,289 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-05 22:00:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:22,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313498358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:22,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:22,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:22,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314529077] [2021-06-05 22:00:22,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:22,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:22,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:22,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:22,376 INFO L87 Difference]: Start difference. First operand 593 states and 1895 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:22,891 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-05 22:00:23,042 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-06-05 22:00:23,214 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 22:00:23,429 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-06-05 22:00:23,681 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-05 22:00:23,823 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 22:00:24,026 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 22:00:24,230 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 22:00:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:24,260 INFO L93 Difference]: Finished difference Result 1015 states and 3000 transitions. [2021-06-05 22:00:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:00:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:24,262 INFO L225 Difference]: With dead ends: 1015 [2021-06-05 22:00:24,262 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 22:00:24,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2022.8ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 22:00:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 591. [2021-06-05 22:00:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1966101694915254) internal successors, (1886), 590 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1886 transitions. [2021-06-05 22:00:24,269 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1886 transitions. Word has length 19 [2021-06-05 22:00:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:24,269 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1886 transitions. [2021-06-05 22:00:24,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1886 transitions. [2021-06-05 22:00:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:24,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:24,270 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:24,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1540 [2021-06-05 22:00:24,471 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:24,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2124606902, now seen corresponding path program 84 times [2021-06-05 22:00:24,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:24,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967870871] [2021-06-05 22:00:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:24,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:24,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967870871] [2021-06-05 22:00:24,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967870871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:24,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862499948] [2021-06-05 22:00:24,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:24,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:24,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:24,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:24,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:24,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:24,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:24,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:24,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:24,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:24,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:24,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:24,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:24,868 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:24,872 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:24,875 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:24,879 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:24,883 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:24,887 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:24,891 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:24,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:24,898 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:24,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:24,902 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:25,094 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 22:00:25,094 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-06-05 22:00:25,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:00:25,096 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-05 22:00:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:25,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862499948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:25,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:25,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:25,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155599766] [2021-06-05 22:00:25,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:25,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:25,325 INFO L87 Difference]: Start difference. First operand 591 states and 1886 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:25,890 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 22:00:26,086 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-06-05 22:00:26,438 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-05 22:00:26,611 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 22:00:26,736 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-06-05 22:00:26,958 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 22:00:27,253 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-06-05 22:00:27,415 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-05 22:00:27,838 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-06-05 22:00:28,063 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 22:00:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:28,064 INFO L93 Difference]: Finished difference Result 1188 states and 3415 transitions. [2021-06-05 22:00:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:28,065 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 22:00:28,065 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 22:00:28,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2853.0ms TimeCoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:00:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 22:00:28,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 599. [2021-06-05 22:00:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2157190635451505) internal successors, (1923), 598 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:28,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1923 transitions. [2021-06-05 22:00:28,073 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1923 transitions. Word has length 19 [2021-06-05 22:00:28,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:28,073 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1923 transitions. [2021-06-05 22:00:28,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1923 transitions. [2021-06-05 22:00:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:28,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:28,074 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:28,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1556 [2021-06-05 22:00:28,281 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash -878017994, now seen corresponding path program 85 times [2021-06-05 22:00:28,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:28,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227119494] [2021-06-05 22:00:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:28,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:28,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227119494] [2021-06-05 22:00:28,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227119494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:28,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188453184] [2021-06-05 22:00:28,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:28,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:28,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:28,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:28,672 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:28,677 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,681 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:28,685 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:28,689 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,693 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:28,698 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:28,701 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:28,705 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,709 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,713 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:28,717 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:28,721 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,725 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:28,729 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:28,732 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:28,736 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:28,740 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:28,743 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,948 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 22:00:28,948 INFO L628 ElimStorePlain]: treesize reduction 101, result has 68.7 percent of original size [2021-06-05 22:00:28,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:00:28,950 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-05 22:00:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:29,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188453184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:29,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:29,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005197620] [2021-06-05 22:00:29,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:29,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:29,244 INFO L87 Difference]: Start difference. First operand 599 states and 1923 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:30,122 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 22:00:30,388 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 22:00:30,692 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 22:00:30,990 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-05 22:00:31,163 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 22:00:31,360 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 22:00:31,686 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 22:00:31,842 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-06-05 22:00:31,983 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 22:00:32,389 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-06-05 22:00:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:32,501 INFO L93 Difference]: Finished difference Result 1095 states and 3202 transitions. [2021-06-05 22:00:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:00:32,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:32,502 INFO L225 Difference]: With dead ends: 1095 [2021-06-05 22:00:32,502 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 22:00:32,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3281.2ms TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:00:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 22:00:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 596. [2021-06-05 22:00:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.196638655462185) internal successors, (1902), 595 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1902 transitions. [2021-06-05 22:00:32,510 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1902 transitions. Word has length 19 [2021-06-05 22:00:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:32,510 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1902 transitions. [2021-06-05 22:00:32,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1902 transitions. [2021-06-05 22:00:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:32,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:32,511 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:32,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-06-05 22:00:32,711 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:32,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1960185702, now seen corresponding path program 86 times [2021-06-05 22:00:32,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:32,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903239645] [2021-06-05 22:00:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:32,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:32,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903239645] [2021-06-05 22:00:32,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903239645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:32,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142980046] [2021-06-05 22:00:32,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:32,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:32,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:33,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:33,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:33,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:33,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:33,139 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 22:00:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:33,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142980046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:33,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:33,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:33,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180402065] [2021-06-05 22:00:33,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:33,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:33,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:33,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:33,188 INFO L87 Difference]: Start difference. First operand 596 states and 1902 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:33,531 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 22:00:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:33,883 INFO L93 Difference]: Finished difference Result 952 states and 2884 transitions. [2021-06-05 22:00:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:00:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:33,885 INFO L225 Difference]: With dead ends: 952 [2021-06-05 22:00:33,885 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 22:00:33,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 819.6ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:00:33,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 22:00:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 598. [2021-06-05 22:00:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.204355108877722) internal successors, (1913), 597 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1913 transitions. [2021-06-05 22:00:33,892 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1913 transitions. Word has length 19 [2021-06-05 22:00:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:33,892 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1913 transitions. [2021-06-05 22:00:33,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1913 transitions. [2021-06-05 22:00:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:33,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:33,893 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:34,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-05 22:00:34,093 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash 519747384, now seen corresponding path program 87 times [2021-06-05 22:00:34,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:34,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800509352] [2021-06-05 22:00:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:34,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:34,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800509352] [2021-06-05 22:00:34,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800509352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:34,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986100617] [2021-06-05 22:00:34,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:34,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:34,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:34,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:34,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:34,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:34,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:34,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:34,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:34,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:34,600 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:34,603 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:34,607 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:34,618 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:34,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:34,624 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:34,689 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-05 22:00:34,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:00:34,689 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 22:00:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:34,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986100617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:34,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:34,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:34,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825113310] [2021-06-05 22:00:34,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:34,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:34,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:34,789 INFO L87 Difference]: Start difference. First operand 598 states and 1913 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:35,695 INFO L93 Difference]: Finished difference Result 1023 states and 3050 transitions. [2021-06-05 22:00:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:35,696 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 22:00:35,696 INFO L226 Difference]: Without dead ends: 973 [2021-06-05 22:00:35,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1115.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-06-05 22:00:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 602. [2021-06-05 22:00:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.2096505823627286) internal successors, (1929), 601 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1929 transitions. [2021-06-05 22:00:35,721 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1929 transitions. Word has length 19 [2021-06-05 22:00:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:35,722 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1929 transitions. [2021-06-05 22:00:35,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1929 transitions. [2021-06-05 22:00:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:35,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:35,722 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:35,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1606,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:35,933 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1152015514, now seen corresponding path program 88 times [2021-06-05 22:00:35,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:35,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085674111] [2021-06-05 22:00:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:36,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:36,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085674111] [2021-06-05 22:00:36,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085674111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:36,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546366216] [2021-06-05 22:00:36,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:36,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:36,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:36,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:36,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:36,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:36,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:36,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:36,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:36,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:36,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:36,352 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,417 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 22:00:36,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:00:36,419 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-05 22:00:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:36,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546366216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:36,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:36,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:36,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679031758] [2021-06-05 22:00:36,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:36,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:36,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:36,523 INFO L87 Difference]: Start difference. First operand 602 states and 1929 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:37,162 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 22:00:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:37,647 INFO L93 Difference]: Finished difference Result 1114 states and 3328 transitions. [2021-06-05 22:00:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:00:37,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:37,649 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 22:00:37,649 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 22:00:37,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1165.0ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:00:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 22:00:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 607. [2021-06-05 22:00:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 3.222772277227723) internal successors, (1953), 606 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1953 transitions. [2021-06-05 22:00:37,657 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1953 transitions. Word has length 19 [2021-06-05 22:00:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:37,657 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1953 transitions. [2021-06-05 22:00:37,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1953 transitions. [2021-06-05 22:00:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:37,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:37,658 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:37,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1622 [2021-06-05 22:00:37,858 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1719704358, now seen corresponding path program 89 times [2021-06-05 22:00:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:37,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556566762] [2021-06-05 22:00:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:38,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:38,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556566762] [2021-06-05 22:00:38,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556566762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:38,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843727275] [2021-06-05 22:00:38,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:38,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:38,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:38,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:38,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:38,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:38,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:38,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:38,247 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:38,251 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:38,256 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:38,260 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:38,264 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:38,268 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:38,273 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:38,277 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:38,281 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:38,285 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:38,289 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:38,293 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:38,296 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:38,300 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:38,305 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:38,309 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:38,313 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:38,317 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:38,321 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:38,324 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,476 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 22:00:38,477 INFO L628 ElimStorePlain]: treesize reduction 208, result has 46.8 percent of original size [2021-06-05 22:00:38,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:00:38,479 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:991, output treesize:183 [2021-06-05 22:00:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:38,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843727275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:38,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:38,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:38,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656561034] [2021-06-05 22:00:38,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:38,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:38,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:38,705 INFO L87 Difference]: Start difference. First operand 607 states and 1953 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:39,233 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 22:00:39,402 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-05 22:00:39,642 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 22:00:39,886 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 22:00:40,057 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-05 22:00:40,227 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 22:00:40,414 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 22:00:40,565 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-05 22:00:40,696 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 22:00:40,944 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-05 22:00:41,164 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-06-05 22:00:41,439 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 22:00:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:41,458 INFO L93 Difference]: Finished difference Result 1128 states and 3321 transitions. [2021-06-05 22:00:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:41,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:41,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:41,459 INFO L225 Difference]: With dead ends: 1128 [2021-06-05 22:00:41,459 INFO L226 Difference]: Without dead ends: 1098 [2021-06-05 22:00:41,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2771.8ms TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:00:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-06-05 22:00:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 610. [2021-06-05 22:00:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.231527093596059) internal successors, (1968), 609 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1968 transitions. [2021-06-05 22:00:41,468 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1968 transitions. Word has length 19 [2021-06-05 22:00:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:41,468 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1968 transitions. [2021-06-05 22:00:41,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1968 transitions. [2021-06-05 22:00:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:41,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:41,476 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:41,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:41,678 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1344506918, now seen corresponding path program 90 times [2021-06-05 22:00:41,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:41,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848719703] [2021-06-05 22:00:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:41,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848719703] [2021-06-05 22:00:41,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848719703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717925719] [2021-06-05 22:00:41,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:41,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:41,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:41,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:41,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:42,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:42,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:42,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:42,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:42,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:42,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:42,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:42,128 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:42,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:42,137 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:42,141 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:42,145 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:42,149 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:42,153 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:42,156 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:42,161 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:42,164 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:42,168 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:42,171 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:42,175 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:42,179 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:42,183 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:42,186 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:42,337 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 22:00:42,337 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 22:00:42,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:00:42,339 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 22:00:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:42,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717925719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:42,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:42,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:42,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520645931] [2021-06-05 22:00:42,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:42,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:42,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:42,602 INFO L87 Difference]: Start difference. First operand 610 states and 1968 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:43,143 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 22:00:43,309 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-05 22:00:43,572 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 22:00:43,842 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 22:00:44,013 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 22:00:44,195 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 22:00:44,358 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 22:00:44,535 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 22:00:44,700 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 22:00:44,854 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 22:00:45,035 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-05 22:00:45,195 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 22:00:45,471 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-05 22:00:45,639 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 22:00:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:45,639 INFO L93 Difference]: Finished difference Result 1120 states and 3320 transitions. [2021-06-05 22:00:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:00:45,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:45,641 INFO L225 Difference]: With dead ends: 1120 [2021-06-05 22:00:45,641 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 22:00:45,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3081.5ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:00:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 22:00:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 608. [2021-06-05 22:00:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.227347611202636) internal successors, (1959), 607 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1959 transitions. [2021-06-05 22:00:45,650 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1959 transitions. Word has length 19 [2021-06-05 22:00:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:45,650 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1959 transitions. [2021-06-05 22:00:45,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1959 transitions. [2021-06-05 22:00:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:45,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:45,651 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:45,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-06-05 22:00:45,852 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash -926613804, now seen corresponding path program 91 times [2021-06-05 22:00:45,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:45,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212124910] [2021-06-05 22:00:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:46,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:46,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212124910] [2021-06-05 22:00:46,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212124910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:46,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571314758] [2021-06-05 22:00:46,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:46,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:46,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:46,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:46,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:46,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:00:46,314 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:46,324 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,392 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 22:00:46,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:00:46,393 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-06-05 22:00:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:46,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571314758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:46,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:46,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:46,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733904717] [2021-06-05 22:00:46,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:46,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:46,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:46,507 INFO L87 Difference]: Start difference. First operand 608 states and 1959 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:47,186 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-06-05 22:00:47,420 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 22:00:47,580 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-06-05 22:00:47,763 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 22:00:47,917 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 22:00:48,099 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 22:00:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:48,145 INFO L93 Difference]: Finished difference Result 1040 states and 3069 transitions. [2021-06-05 22:00:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:00:48,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:48,147 INFO L225 Difference]: With dead ends: 1040 [2021-06-05 22:00:48,147 INFO L226 Difference]: Without dead ends: 1003 [2021-06-05 22:00:48,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1697.9ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-05 22:00:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 608. [2021-06-05 22:00:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.224052718286656) internal successors, (1957), 607 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1957 transitions. [2021-06-05 22:00:48,155 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1957 transitions. Word has length 19 [2021-06-05 22:00:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:48,155 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1957 transitions. [2021-06-05 22:00:48,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1957 transitions. [2021-06-05 22:00:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:48,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:48,156 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:48,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-06-05 22:00:48,357 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1491616842, now seen corresponding path program 92 times [2021-06-05 22:00:48,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:48,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997343144] [2021-06-05 22:00:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:48,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:48,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997343144] [2021-06-05 22:00:48,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997343144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:48,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709224018] [2021-06-05 22:00:48,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:48,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:48,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:48,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:48,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:48,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:48,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:48,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:48,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:48,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:48,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:48,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:48,822 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.4 percent of original size [2021-06-05 22:00:48,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:00:48,823 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:158, output treesize:83 [2021-06-05 22:00:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:49,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709224018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:49,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:49,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:49,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014849534] [2021-06-05 22:00:49,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:49,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:49,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:49,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:49,007 INFO L87 Difference]: Start difference. First operand 608 states and 1957 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:49,730 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 22:00:50,058 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 22:00:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:50,292 INFO L93 Difference]: Finished difference Result 1117 states and 3285 transitions. [2021-06-05 22:00:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:00:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:50,294 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 22:00:50,294 INFO L226 Difference]: Without dead ends: 1038 [2021-06-05 22:00:50,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1450.6ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-05 22:00:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 615. [2021-06-05 22:00:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 3.239413680781759) internal successors, (1989), 614 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1989 transitions. [2021-06-05 22:00:50,302 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1989 transitions. Word has length 19 [2021-06-05 22:00:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:50,302 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1989 transitions. [2021-06-05 22:00:50,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1989 transitions. [2021-06-05 22:00:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:50,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:50,303 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:50,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-05 22:00:50,503 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:50,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:50,503 INFO L82 PathProgramCache]: Analyzing trace with hash 497471994, now seen corresponding path program 93 times [2021-06-05 22:00:50,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:50,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023868683] [2021-06-05 22:00:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:50,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023868683] [2021-06-05 22:00:50,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023868683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804621458] [2021-06-05 22:00:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:50,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:00:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:50,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:50,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:50,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:50,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:51,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:51,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:51,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:51,012 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:51,016 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:51,019 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,126 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-06-05 22:00:51,126 INFO L628 ElimStorePlain]: treesize reduction 28, result has 82.6 percent of original size [2021-06-05 22:00:51,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:00:51,128 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-06-05 22:00:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:51,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804621458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:51,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:51,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:51,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433427995] [2021-06-05 22:00:51,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:51,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:51,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:51,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:51,419 INFO L87 Difference]: Start difference. First operand 615 states and 1989 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:51,868 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 22:00:52,092 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 22:00:52,275 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-06-05 22:00:52,690 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 22:00:52,921 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-06-05 22:00:53,192 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 22:00:53,331 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 22:00:53,557 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 22:00:53,817 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 22:00:54,047 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 22:00:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:54,048 INFO L93 Difference]: Finished difference Result 1317 states and 3854 transitions. [2021-06-05 22:00:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:00:54,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:54,050 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 22:00:54,050 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 22:00:54,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2908.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:00:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 22:00:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 637. [2021-06-05 22:00:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.279874213836478) internal successors, (2086), 636 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2086 transitions. [2021-06-05 22:00:54,059 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2086 transitions. Word has length 19 [2021-06-05 22:00:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:54,059 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2086 transitions. [2021-06-05 22:00:54,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2086 transitions. [2021-06-05 22:00:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:54,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:54,060 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:54,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:54,260 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1789814394, now seen corresponding path program 94 times [2021-06-05 22:00:54,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:54,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893582387] [2021-06-05 22:00:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:54,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:54,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893582387] [2021-06-05 22:00:54,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893582387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:54,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100987824] [2021-06-05 22:00:54,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:54,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:54,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:00:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:54,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:54,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:54,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:54,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:54,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:54,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:54,718 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:54,721 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:54,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:54,728 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,838 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-05 22:00:54,838 INFO L628 ElimStorePlain]: treesize reduction 52, result has 71.9 percent of original size [2021-06-05 22:00:54,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:00:54,839 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-06-05 22:00:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:55,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100987824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:55,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:55,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:00:55,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390175370] [2021-06-05 22:00:55,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:00:55,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:55,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:00:55,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:00:55,135 INFO L87 Difference]: Start difference. First operand 637 states and 2086 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:55,587 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-05 22:00:55,808 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 22:00:56,032 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 22:00:56,356 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 22:00:56,586 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 22:00:56,716 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 22:00:56,985 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 22:00:57,235 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 22:00:57,387 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 22:00:57,643 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 22:00:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:57,692 INFO L93 Difference]: Finished difference Result 1320 states and 3825 transitions. [2021-06-05 22:00:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:57,694 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 22:00:57,694 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 22:00:57,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2802.5ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:00:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 22:00:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 631. [2021-06-05 22:00:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 3.2634920634920634) internal successors, (2056), 630 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2056 transitions. [2021-06-05 22:00:57,703 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2056 transitions. Word has length 19 [2021-06-05 22:00:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:57,703 INFO L482 AbstractCegarLoop]: Abstraction has 631 states and 2056 transitions. [2021-06-05 22:00:57,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2056 transitions. [2021-06-05 22:00:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:57,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:57,704 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:57,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 22:00:57,904 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:57,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1830486540, now seen corresponding path program 95 times [2021-06-05 22:00:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:57,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747145061] [2021-06-05 22:00:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:58,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747145061] [2021-06-05 22:00:58,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747145061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:58,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402214080] [2021-06-05 22:00:58,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:58,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:58,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:58,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:58,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:58,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:00:58,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:58,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:58,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:58,196 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:00:58,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:00:58,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:00:58,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:00:58,209 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:58,212 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:00:58,215 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,292 INFO L628 ElimStorePlain]: treesize reduction 53, result has 64.4 percent of original size [2021-06-05 22:00:58,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:00:58,293 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-05 22:00:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:58,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402214080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:58,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:58,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:00:58,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309831683] [2021-06-05 22:00:58,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:00:58,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:58,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:00:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:00:58,479 INFO L87 Difference]: Start difference. First operand 631 states and 2056 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:58,821 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 22:00:58,951 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-05 22:00:59,121 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 22:00:59,429 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 22:00:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:59,597 INFO L93 Difference]: Finished difference Result 1010 states and 3060 transitions. [2021-06-05 22:00:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:00:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:00:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:59,598 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 22:00:59,598 INFO L226 Difference]: Without dead ends: 960 [2021-06-05 22:00:59,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1210.4ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:00:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-06-05 22:00:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 624. [2021-06-05 22:00:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 3.2520064205457464) internal successors, (2026), 623 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2026 transitions. [2021-06-05 22:00:59,606 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2026 transitions. Word has length 19 [2021-06-05 22:00:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:59,606 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 2026 transitions. [2021-06-05 22:00:59,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2026 transitions. [2021-06-05 22:00:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:00:59,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:59,607 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:59,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1751,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:59,807 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1145795884, now seen corresponding path program 96 times [2021-06-05 22:00:59,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:59,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171876369] [2021-06-05 22:00:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:59,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:59,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171876369] [2021-06-05 22:00:59,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171876369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:59,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718443109] [2021-06-05 22:00:59,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:59,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:00:59,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:59,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:00,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:00,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:00,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:00,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:00,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:01:00,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:00,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:00,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:00,208 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 22:01:00,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:00,209 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 22:01:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:00,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718443109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:00,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:00,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312209579] [2021-06-05 22:01:00,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:00,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:00,260 INFO L87 Difference]: Start difference. First operand 624 states and 2026 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:00,889 INFO L93 Difference]: Finished difference Result 868 states and 2676 transitions. [2021-06-05 22:01:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:01:00,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:00,891 INFO L225 Difference]: With dead ends: 868 [2021-06-05 22:01:00,891 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 22:01:00,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:00,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 22:01:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 629. [2021-06-05 22:01:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-05 22:01:00,898 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-05 22:01:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:00,898 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-05 22:01:00,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-05 22:01:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:00,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:00,898 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:01,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-06-05 22:01:01,099 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -294642434, now seen corresponding path program 97 times [2021-06-05 22:01:01,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:01,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693855927] [2021-06-05 22:01:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:01,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:01,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693855927] [2021-06-05 22:01:01,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693855927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:01,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762430892] [2021-06-05 22:01:01,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:01:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:01,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:01,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:01,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:01,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:01,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:01,424 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:01,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:01,431 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:01,434 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:01,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:01,441 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:01,444 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:01,447 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,509 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 22:01:01,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:01,510 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 22:01:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762430892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:01,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:01,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:01,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558101754] [2021-06-05 22:01:01,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:01,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:01,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:01,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:01,605 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:02,132 INFO L93 Difference]: Finished difference Result 892 states and 2724 transitions. [2021-06-05 22:01:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:01:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:02,133 INFO L225 Difference]: With dead ends: 892 [2021-06-05 22:01:02,133 INFO L226 Difference]: Without dead ends: 842 [2021-06-05 22:01:02,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-05 22:01:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 629. [2021-06-05 22:01:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-05 22:01:02,140 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-05 22:01:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:02,140 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-05 22:01:02,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-05 22:01:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:02,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:02,141 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:02,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-06-05 22:01:02,342 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1854154102, now seen corresponding path program 98 times [2021-06-05 22:01:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:02,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509956930] [2021-06-05 22:01:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:02,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:02,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509956930] [2021-06-05 22:01:02,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509956930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:02,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226816194] [2021-06-05 22:01:02,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:02,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:02,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:02,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:02,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:02,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:02,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:02,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:02,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:02,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:02,674 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:02,676 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:02,679 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:02,683 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:02,686 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:02,688 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,736 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 22:01:02,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:02,737 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 22:01:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:02,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226816194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:02,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:02,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:01:02,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352318345] [2021-06-05 22:01:02,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:01:02,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:02,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:01:02,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:02,828 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:03,197 INFO L93 Difference]: Finished difference Result 819 states and 2567 transitions. [2021-06-05 22:01:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:03,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:03,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:03,199 INFO L225 Difference]: With dead ends: 819 [2021-06-05 22:01:03,199 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 22:01:03,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:01:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 22:01:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 629. [2021-06-05 22:01:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-05 22:01:03,206 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-05 22:01:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:03,206 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-05 22:01:03,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-05 22:01:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:03,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:03,207 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:03,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1797 [2021-06-05 22:01:03,407 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1330594314, now seen corresponding path program 99 times [2021-06-05 22:01:03,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:03,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136638497] [2021-06-05 22:01:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:03,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:03,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136638497] [2021-06-05 22:01:03,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136638497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:03,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359325550] [2021-06-05 22:01:03,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:03,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:03,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:03,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:03,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:03,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:03,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:03,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:03,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:03,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:01:03,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:03,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:03,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:03,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:03,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:03,863 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 22:01:03,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:03,864 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-05 22:01:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:03,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359325550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:03,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:03,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:03,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852111841] [2021-06-05 22:01:03,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:03,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:03,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:03,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:03,922 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:04,652 INFO L93 Difference]: Finished difference Result 971 states and 2936 transitions. [2021-06-05 22:01:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:01:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:04,654 INFO L225 Difference]: With dead ends: 971 [2021-06-05 22:01:04,654 INFO L226 Difference]: Without dead ends: 942 [2021-06-05 22:01:04,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 683.5ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-05 22:01:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 632. [2021-06-05 22:01:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.2646592709984152) internal successors, (2060), 631 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2060 transitions. [2021-06-05 22:01:04,662 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2060 transitions. Word has length 19 [2021-06-05 22:01:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:04,662 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2060 transitions. [2021-06-05 22:01:04,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2060 transitions. [2021-06-05 22:01:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:04,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:04,663 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:04,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:04,863 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1523934664, now seen corresponding path program 100 times [2021-06-05 22:01:04,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:04,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550590400] [2021-06-05 22:01:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:05,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:05,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550590400] [2021-06-05 22:01:05,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550590400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:05,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932752444] [2021-06-05 22:01:05,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:05,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:05,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:01:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:05,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:05,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:05,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:05,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:05,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:05,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:05,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:05,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:05,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:05,268 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,332 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-05 22:01:05,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:05,333 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 22:01:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932752444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:05,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:05,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027982645] [2021-06-05 22:01:05,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:05,448 INFO L87 Difference]: Start difference. First operand 632 states and 2060 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:05,824 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-05 22:01:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:06,229 INFO L93 Difference]: Finished difference Result 1072 states and 3158 transitions. [2021-06-05 22:01:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:06,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:06,230 INFO L225 Difference]: With dead ends: 1072 [2021-06-05 22:01:06,230 INFO L226 Difference]: Without dead ends: 1014 [2021-06-05 22:01:06,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 840.4ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:01:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-06-05 22:01:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 641. [2021-06-05 22:01:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 3.265625) internal successors, (2090), 640 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 2090 transitions. [2021-06-05 22:01:06,239 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 2090 transitions. Word has length 19 [2021-06-05 22:01:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:06,239 INFO L482 AbstractCegarLoop]: Abstraction has 641 states and 2090 transitions. [2021-06-05 22:01:06,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 2090 transitions. [2021-06-05 22:01:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:06,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:06,240 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:06,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1828,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:06,440 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash -147828234, now seen corresponding path program 101 times [2021-06-05 22:01:06,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:06,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634625560] [2021-06-05 22:01:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:06,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:06,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634625560] [2021-06-05 22:01:06,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634625560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:06,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485327705] [2021-06-05 22:01:06,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:06,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:06,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:06,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:06,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:06,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:06,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:06,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:01:06,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:06,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:06,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:06,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:06,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:06,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:06,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:06,844 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 22:01:06,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:06,845 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-05 22:01:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:06,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485327705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:06,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:06,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081356739] [2021-06-05 22:01:06,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:06,932 INFO L87 Difference]: Start difference. First operand 641 states and 2090 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,498 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 22:01:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:07,776 INFO L93 Difference]: Finished difference Result 1019 states and 3029 transitions. [2021-06-05 22:01:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:01:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:07,777 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 22:01:07,777 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 22:01:07,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 841.6ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:01:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 22:01:07,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 639. [2021-06-05 22:01:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.261755485893417) internal successors, (2081), 638 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2081 transitions. [2021-06-05 22:01:07,785 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2081 transitions. Word has length 19 [2021-06-05 22:01:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:07,785 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2081 transitions. [2021-06-05 22:01:07,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2081 transitions. [2021-06-05 22:01:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:07,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:07,786 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:07,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1846 [2021-06-05 22:01:07,989 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1431549238, now seen corresponding path program 102 times [2021-06-05 22:01:07,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:07,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005886631] [2021-06-05 22:01:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:08,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:08,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005886631] [2021-06-05 22:01:08,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005886631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:08,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101818615] [2021-06-05 22:01:08,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:08,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:08,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:08,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:08,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:08,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:08,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:08,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:08,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:08,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:08,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:08,432 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:08,436 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:08,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:08,445 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:08,448 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:08,452 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:08,456 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:08,460 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:08,464 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:08,468 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:08,472 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:08,476 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:08,480 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:08,483 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:08,487 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:08,491 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:08,495 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,645 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 22:01:08,645 INFO L628 ElimStorePlain]: treesize reduction 183, result has 49.4 percent of original size [2021-06-05 22:01:08,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:01:08,647 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:927, output treesize:179 [2021-06-05 22:01:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:08,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101818615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:08,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:08,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:08,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207494931] [2021-06-05 22:01:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:08,848 INFO L87 Difference]: Start difference. First operand 639 states and 2081 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:09,469 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 22:01:10,019 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-06-05 22:01:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:10,035 INFO L93 Difference]: Finished difference Result 1140 states and 3364 transitions. [2021-06-05 22:01:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:10,037 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 22:01:10,037 INFO L226 Difference]: Without dead ends: 1096 [2021-06-05 22:01:10,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1332.6ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-06-05 22:01:10,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 645. [2021-06-05 22:01:10,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.277950310559006) internal successors, (2111), 644 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:10,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2111 transitions. [2021-06-05 22:01:10,045 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2111 transitions. Word has length 19 [2021-06-05 22:01:10,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:10,045 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2111 transitions. [2021-06-05 22:01:10,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2111 transitions. [2021-06-05 22:01:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:10,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:10,046 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:10,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-06-05 22:01:10,247 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:10,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1571075658, now seen corresponding path program 103 times [2021-06-05 22:01:10,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:10,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439099787] [2021-06-05 22:01:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:10,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:10,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439099787] [2021-06-05 22:01:10,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439099787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:10,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220521977] [2021-06-05 22:01:10,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:10,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:01:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:10,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:10,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:10,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:10,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:10,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:10,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:10,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:10,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:10,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:10,617 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:10,620 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:10,624 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:10,627 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:10,631 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,812 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 22:01:10,812 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-06-05 22:01:10,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:01:10,815 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-06-05 22:01:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:11,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220521977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:11,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:11,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157543377] [2021-06-05 22:01:11,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:11,081 INFO L87 Difference]: Start difference. First operand 645 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:11,681 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 22:01:11,852 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 22:01:12,179 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 22:01:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:12,437 INFO L93 Difference]: Finished difference Result 1125 states and 3321 transitions. [2021-06-05 22:01:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:12,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:12,439 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 22:01:12,439 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 22:01:12,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1514.8ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 22:01:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 644. [2021-06-05 22:01:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 3.2674961119751167) internal successors, (2101), 643 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 2101 transitions. [2021-06-05 22:01:12,447 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 2101 transitions. Word has length 19 [2021-06-05 22:01:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:12,448 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 2101 transitions. [2021-06-05 22:01:12,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 2101 transitions. [2021-06-05 22:01:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:12,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:12,448 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:12,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1880 [2021-06-05 22:01:12,649 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1009794104, now seen corresponding path program 104 times [2021-06-05 22:01:12,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:12,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051198253] [2021-06-05 22:01:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:12,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:12,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051198253] [2021-06-05 22:01:12,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051198253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:12,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901643554] [2021-06-05 22:01:12,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:12,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:12,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:12,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:12,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:12,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:12,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:12,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:12,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:12,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:12,965 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:12,968 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:12,971 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:12,974 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:12,977 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:12,980 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:13,026 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 22:01:13,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:13,027 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 22:01:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901643554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:13,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:01:13,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712652712] [2021-06-05 22:01:13,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:01:13,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:13,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:01:13,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:13,109 INFO L87 Difference]: Start difference. First operand 644 states and 2101 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:13,599 INFO L93 Difference]: Finished difference Result 868 states and 2721 transitions. [2021-06-05 22:01:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:13,601 INFO L225 Difference]: With dead ends: 868 [2021-06-05 22:01:13,601 INFO L226 Difference]: Without dead ends: 853 [2021-06-05 22:01:13,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 526.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:01:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-06-05 22:01:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 647. [2021-06-05 22:01:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.2755417956656347) internal successors, (2116), 646 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2116 transitions. [2021-06-05 22:01:13,608 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2116 transitions. Word has length 19 [2021-06-05 22:01:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:13,608 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 2116 transitions. [2021-06-05 22:01:13,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2116 transitions. [2021-06-05 22:01:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:13,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:13,609 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:13,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1903,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:13,809 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:13,809 INFO L82 PathProgramCache]: Analyzing trace with hash -258393666, now seen corresponding path program 105 times [2021-06-05 22:01:13,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:13,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461388216] [2021-06-05 22:01:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:13,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461388216] [2021-06-05 22:01:13,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461388216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279235069] [2021-06-05 22:01:13,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:13,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:13,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:13,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:01:13,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:14,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:14,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:14,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:14,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:14,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:14,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:14,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:14,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:14,120 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:14,124 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:14,128 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:14,132 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:14,135 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:14,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:14,143 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:14,147 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:14,150 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:14,154 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:14,157 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,343 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-05 22:01:14,343 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-06-05 22:01:14,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:01:14,345 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-05 22:01:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:14,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279235069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:14,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:14,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:01:14,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588464813] [2021-06-05 22:01:14,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:01:14,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:14,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:01:14,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:14,567 INFO L87 Difference]: Start difference. First operand 647 states and 2116 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:15,225 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 22:01:15,623 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 22:01:15,951 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 22:01:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:16,073 INFO L93 Difference]: Finished difference Result 1215 states and 3655 transitions. [2021-06-05 22:01:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:16,074 INFO L225 Difference]: With dead ends: 1215 [2021-06-05 22:01:16,074 INFO L226 Difference]: Without dead ends: 1125 [2021-06-05 22:01:16,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1508.5ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-05 22:01:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 674. [2021-06-05 22:01:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.335809806835067) internal successors, (2245), 673 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2245 transitions. [2021-06-05 22:01:16,083 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2245 transitions. Word has length 19 [2021-06-05 22:01:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:16,084 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2245 transitions. [2021-06-05 22:01:16,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:16,084 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2245 transitions. [2021-06-05 22:01:16,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:16,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:16,084 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:16,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1921 [2021-06-05 22:01:16,285 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash 156959958, now seen corresponding path program 106 times [2021-06-05 22:01:16,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:16,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569489252] [2021-06-05 22:01:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:16,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:16,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569489252] [2021-06-05 22:01:16,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569489252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:16,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163216801] [2021-06-05 22:01:16,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:16,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:16,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:16,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:16,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:16,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:16,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:16,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:16,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:16,597 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:16,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:16,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:16,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:16,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:16,617 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:16,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:16,624 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:16,628 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:16,632 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:16,635 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:16,639 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:16,790 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 22:01:16,791 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-06-05 22:01:16,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:01:16,793 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:183 [2021-06-05 22:01:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:17,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163216801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:17,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:17,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:01:17,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8794538] [2021-06-05 22:01:17,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:01:17,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:17,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:01:17,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:17,070 INFO L87 Difference]: Start difference. First operand 674 states and 2245 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:17,801 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 22:01:18,036 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-05 22:01:18,233 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 22:01:18,484 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-06-05 22:01:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:18,616 INFO L93 Difference]: Finished difference Result 1157 states and 3515 transitions. [2021-06-05 22:01:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:01:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:18,617 INFO L225 Difference]: With dead ends: 1157 [2021-06-05 22:01:18,618 INFO L226 Difference]: Without dead ends: 1084 [2021-06-05 22:01:18,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1517.2ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-06-05 22:01:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 666. [2021-06-05 22:01:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.3142857142857145) internal successors, (2204), 665 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2204 transitions. [2021-06-05 22:01:18,626 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2204 transitions. Word has length 19 [2021-06-05 22:01:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:18,626 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2204 transitions. [2021-06-05 22:01:18,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2204 transitions. [2021-06-05 22:01:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:18,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:18,627 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:18,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1938,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:18,828 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1691439274, now seen corresponding path program 107 times [2021-06-05 22:01:18,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:18,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983656100] [2021-06-05 22:01:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:18,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:18,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983656100] [2021-06-05 22:01:18,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983656100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:18,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270859107] [2021-06-05 22:01:18,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:18,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:18,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:18,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:19,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:19,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:19,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:01:19,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:19,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:19,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:19,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-06-05 22:01:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:19,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270859107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:19,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:19,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:01:19,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878740054] [2021-06-05 22:01:19,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:01:19,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:19,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:01:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:19,276 INFO L87 Difference]: Start difference. First operand 666 states and 2204 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:20,117 INFO L93 Difference]: Finished difference Result 1001 states and 3102 transitions. [2021-06-05 22:01:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:20,119 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:01:20,119 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 22:01:20,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 865.0ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 22:01:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 672. [2021-06-05 22:01:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-05 22:01:20,127 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-05 22:01:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:20,127 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-05 22:01:20,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-05 22:01:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:20,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:20,127 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:20,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1958,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:20,328 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:20,328 INFO L82 PathProgramCache]: Analyzing trace with hash 251000956, now seen corresponding path program 108 times [2021-06-05 22:01:20,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:20,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424187159] [2021-06-05 22:01:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:20,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:20,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424187159] [2021-06-05 22:01:20,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424187159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:20,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420489493] [2021-06-05 22:01:20,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:20,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:20,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:20,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:20,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:20,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:20,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:20,695 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:20,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:20,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:20,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:20,707 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:20,710 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:20,713 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:20,760 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 22:01:20,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:20,761 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 22:01:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:20,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420489493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:20,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:20,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:20,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609440473] [2021-06-05 22:01:20,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:20,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:20,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:20,866 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:21,616 INFO L93 Difference]: Finished difference Result 1043 states and 3174 transitions. [2021-06-05 22:01:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:21,617 INFO L225 Difference]: With dead ends: 1043 [2021-06-05 22:01:21,617 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 22:01:21,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 22:01:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 672. [2021-06-05 22:01:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-05 22:01:21,625 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-05 22:01:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:21,625 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-05 22:01:21,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-05 22:01:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:21,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:21,626 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:21,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-06-05 22:01:21,827 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash 158615530, now seen corresponding path program 109 times [2021-06-05 22:01:21,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:21,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974625264] [2021-06-05 22:01:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:22,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:22,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974625264] [2021-06-05 22:01:22,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974625264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:22,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316312991] [2021-06-05 22:01:22,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:01:22,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:22,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:22,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:22,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:22,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:22,278 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,283 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:22,287 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:22,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,295 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:22,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:22,303 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:22,307 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,311 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,315 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:22,320 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:22,323 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,327 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:22,331 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:22,334 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:22,338 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:22,342 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:22,345 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,533 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-05 22:01:22,534 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-06-05 22:01:22,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:01:22,536 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-05 22:01:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:22,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316312991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:22,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:22,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:01:22,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074152561] [2021-06-05 22:01:22,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:01:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:22,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:01:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:22,772 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:23,833 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-05 22:01:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:23,859 INFO L93 Difference]: Finished difference Result 1195 states and 3544 transitions. [2021-06-05 22:01:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:23,861 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 22:01:23,861 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:01:23,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1235.0ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:01:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 678. [2021-06-05 22:01:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.342688330871492) internal successors, (2263), 677 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2263 transitions. [2021-06-05 22:01:23,870 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2263 transitions. Word has length 19 [2021-06-05 22:01:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:23,870 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2263 transitions. [2021-06-05 22:01:23,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2263 transitions. [2021-06-05 22:01:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:23,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:23,871 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:24,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:24,071 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:24,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1450957930, now seen corresponding path program 110 times [2021-06-05 22:01:24,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:24,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534715063] [2021-06-05 22:01:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:24,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:24,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534715063] [2021-06-05 22:01:24,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534715063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:24,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506694342] [2021-06-05 22:01:24,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:24,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:24,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:24,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:24,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:24,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:24,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:24,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:24,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:24,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:24,490 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:24,494 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:24,497 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:24,501 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:24,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:24,508 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:24,512 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:24,516 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:24,519 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:24,522 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,671 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 22:01:24,671 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-06-05 22:01:24,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:01:24,673 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-05 22:01:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:24,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506694342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:24,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:24,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:01:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755753396] [2021-06-05 22:01:24,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:01:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:01:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:24,941 INFO L87 Difference]: Start difference. First operand 678 states and 2263 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:25,524 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 22:01:25,670 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 22:01:25,880 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 22:01:26,124 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-06-05 22:01:26,385 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 22:01:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:26,532 INFO L93 Difference]: Finished difference Result 1109 states and 3354 transitions. [2021-06-05 22:01:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:26,533 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 22:01:26,533 INFO L226 Difference]: Without dead ends: 1079 [2021-06-05 22:01:26,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1675.0ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-05 22:01:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 672. [2021-06-05 22:01:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-05 22:01:26,542 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-05 22:01:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:26,543 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-05 22:01:26,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-05 22:01:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:26,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:26,543 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:26,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2001 [2021-06-05 22:01:26,744 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash 228725566, now seen corresponding path program 111 times [2021-06-05 22:01:26,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:26,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473889733] [2021-06-05 22:01:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:26,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:26,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473889733] [2021-06-05 22:01:26,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473889733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:26,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950874681] [2021-06-05 22:01:26,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:26,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:26,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:26,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:26,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:26,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:26,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:26,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:26,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:27,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:27,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:27,008 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:27,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,086 INFO L628 ElimStorePlain]: treesize reduction 35, result has 73.3 percent of original size [2021-06-05 22:01:27,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:01:27,087 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:96 [2021-06-05 22:01:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:27,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950874681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:27,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:27,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:27,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625936985] [2021-06-05 22:01:27,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:27,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:27,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:27,326 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:27,789 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 22:01:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:28,352 INFO L93 Difference]: Finished difference Result 1335 states and 4006 transitions. [2021-06-05 22:01:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:01:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:28,354 INFO L225 Difference]: With dead ends: 1335 [2021-06-05 22:01:28,354 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 22:01:28,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1041.4ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 22:01:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 684. [2021-06-05 22:01:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.348462664714495) internal successors, (2287), 683 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2287 transitions. [2021-06-05 22:01:28,364 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2287 transitions. Word has length 19 [2021-06-05 22:01:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:28,364 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2287 transitions. [2021-06-05 22:01:28,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2287 transitions. [2021-06-05 22:01:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:28,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:28,365 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:28,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2024 [2021-06-05 22:01:28,565 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1521067966, now seen corresponding path program 112 times [2021-06-05 22:01:28,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:28,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775855460] [2021-06-05 22:01:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:28,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775855460] [2021-06-05 22:01:28,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775855460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485216396] [2021-06-05 22:01:28,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:28,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:28,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:28,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:28,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:28,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:28,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:28,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:28,841 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:28,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:28,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:28,850 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,926 INFO L628 ElimStorePlain]: treesize reduction 35, result has 73.3 percent of original size [2021-06-05 22:01:28,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:01:28,927 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:96 [2021-06-05 22:01:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:29,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485216396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:29,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:29,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:29,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086847315] [2021-06-05 22:01:29,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:29,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:29,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:29,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:29,220 INFO L87 Difference]: Start difference. First operand 684 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:29,700 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 22:01:29,884 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 22:01:30,059 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 22:01:30,236 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-06-05 22:01:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:30,527 INFO L93 Difference]: Finished difference Result 1330 states and 3994 transitions. [2021-06-05 22:01:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:30,530 INFO L225 Difference]: With dead ends: 1330 [2021-06-05 22:01:30,530 INFO L226 Difference]: Without dead ends: 1300 [2021-06-05 22:01:30,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1347.5ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-06-05 22:01:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 676. [2021-06-05 22:01:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.334814814814815) internal successors, (2251), 675 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2251 transitions. [2021-06-05 22:01:30,540 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2251 transitions. Word has length 19 [2021-06-05 22:01:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:30,540 INFO L482 AbstractCegarLoop]: Abstraction has 676 states and 2251 transitions. [2021-06-05 22:01:30,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2251 transitions. [2021-06-05 22:01:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:30,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:30,541 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:30,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:30,741 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1561740112, now seen corresponding path program 113 times [2021-06-05 22:01:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:30,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277732733] [2021-06-05 22:01:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:30,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277732733] [2021-06-05 22:01:30,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277732733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957156264] [2021-06-05 22:01:30,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:30,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:30,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:30,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:31,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:31,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:31,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:31,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:31,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:31,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:31,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:31,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:31,030 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:31,033 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,112 INFO L628 ElimStorePlain]: treesize reduction 46, result has 69.1 percent of original size [2021-06-05 22:01:31,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:01:31,113 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:310, output treesize:103 [2021-06-05 22:01:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:31,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957156264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:31,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:31,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:01:31,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53494713] [2021-06-05 22:01:31,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:01:31,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:31,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:01:31,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:31,300 INFO L87 Difference]: Start difference. First operand 676 states and 2251 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:31,921 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-06-05 22:01:32,073 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 22:01:32,265 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-05 22:01:32,606 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-05 22:01:33,073 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-05 22:01:33,313 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-05 22:01:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:33,313 INFO L93 Difference]: Finished difference Result 1173 states and 3540 transitions. [2021-06-05 22:01:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:01:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:33,315 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 22:01:33,315 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 22:01:33,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2054.9ms TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 22:01:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 673. [2021-06-05 22:01:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.3407738095238093) internal successors, (2245), 672 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2245 transitions. [2021-06-05 22:01:33,323 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2245 transitions. Word has length 19 [2021-06-05 22:01:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:33,324 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2245 transitions. [2021-06-05 22:01:33,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2245 transitions. [2021-06-05 22:01:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:33,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:33,324 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:33,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-06-05 22:01:33,525 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash -330290710, now seen corresponding path program 114 times [2021-06-05 22:01:33,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:33,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681727215] [2021-06-05 22:01:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:33,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:33,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681727215] [2021-06-05 22:01:33,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681727215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:33,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61553178] [2021-06-05 22:01:33,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:33,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:33,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:33,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:33,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:33,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:33,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:01:33,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:33,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:33,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:33,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:33,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:33,903 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 22:01:33,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:33,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 22:01:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:33,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61553178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:33,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:33,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:01:33,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559380880] [2021-06-05 22:01:33,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:01:33,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:33,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:01:33,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:01:33,953 INFO L87 Difference]: Start difference. First operand 673 states and 2245 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:34,722 INFO L93 Difference]: Finished difference Result 947 states and 2977 transitions. [2021-06-05 22:01:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:01:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:34,723 INFO L225 Difference]: With dead ends: 947 [2021-06-05 22:01:34,723 INFO L226 Difference]: Without dead ends: 932 [2021-06-05 22:01:34,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 751.1ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-05 22:01:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 674. [2021-06-05 22:01:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.3432392273402676) internal successors, (2250), 673 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2250 transitions. [2021-06-05 22:01:34,731 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2250 transitions. Word has length 19 [2021-06-05 22:01:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:34,731 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2250 transitions. [2021-06-05 22:01:34,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2250 transitions. [2021-06-05 22:01:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:34,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:34,732 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:34,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:34,932 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:34,933 INFO L82 PathProgramCache]: Analyzing trace with hash 20330052, now seen corresponding path program 115 times [2021-06-05 22:01:34,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:34,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75477909] [2021-06-05 22:01:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:35,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:35,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75477909] [2021-06-05 22:01:35,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75477909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:35,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419463514] [2021-06-05 22:01:35,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:35,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:35,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:35,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:35,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:35,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:35,252 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:35,256 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:01:35,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:35,261 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:35,264 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,345 INFO L628 ElimStorePlain]: treesize reduction 28, result has 77.4 percent of original size [2021-06-05 22:01:35,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:01:35,346 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:243, output treesize:96 [2021-06-05 22:01:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419463514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:35,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:35,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:01:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748028938] [2021-06-05 22:01:35,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:01:35,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:01:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:01:35,451 INFO L87 Difference]: Start difference. First operand 674 states and 2250 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:36,111 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 22:01:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:36,715 INFO L93 Difference]: Finished difference Result 1151 states and 3502 transitions. [2021-06-05 22:01:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:36,716 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 22:01:36,716 INFO L226 Difference]: Without dead ends: 1101 [2021-06-05 22:01:36,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1153.7ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-05 22:01:36,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 683. [2021-06-05 22:01:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.341642228739003) internal successors, (2279), 682 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2279 transitions. [2021-06-05 22:01:36,725 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2279 transitions. Word has length 19 [2021-06-05 22:01:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:36,726 INFO L482 AbstractCegarLoop]: Abstraction has 683 states and 2279 transitions. [2021-06-05 22:01:36,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2279 transitions. [2021-06-05 22:01:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:36,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:36,726 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:36,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:36,927 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash -52617630, now seen corresponding path program 116 times [2021-06-05 22:01:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:36,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447773258] [2021-06-05 22:01:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:37,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:37,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447773258] [2021-06-05 22:01:37,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447773258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:37,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892813366] [2021-06-05 22:01:37,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:37,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:37,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:37,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:37,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:37,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:37,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:37,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:37,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:37,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:01:37,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:37,276 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,310 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 22:01:37,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:37,311 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 22:01:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:37,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892813366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:37,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:37,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:37,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811528081] [2021-06-05 22:01:37,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:37,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:37,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:37,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:37,358 INFO L87 Difference]: Start difference. First operand 683 states and 2279 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:37,811 INFO L93 Difference]: Finished difference Result 871 states and 2801 transitions. [2021-06-05 22:01:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:37,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:37,813 INFO L225 Difference]: With dead ends: 871 [2021-06-05 22:01:37,813 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 22:01:37,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:01:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 22:01:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 689. [2021-06-05 22:01:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 3.3401162790697674) internal successors, (2298), 688 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2298 transitions. [2021-06-05 22:01:37,821 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2298 transitions. Word has length 19 [2021-06-05 22:01:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:37,821 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 2298 transitions. [2021-06-05 22:01:37,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2298 transitions. [2021-06-05 22:01:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:37,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:37,822 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:38,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2118,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:38,025 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1493055948, now seen corresponding path program 117 times [2021-06-05 22:01:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953128009] [2021-06-05 22:01:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:38,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:38,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953128009] [2021-06-05 22:01:38,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953128009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:38,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677645360] [2021-06-05 22:01:38,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:38,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:38,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:38,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:38,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:38,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:38,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:38,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:38,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:38,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:38,357 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:38,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:38,363 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:38,366 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:38,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:38,372 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:38,374 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,421 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 22:01:38,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:38,422 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 22:01:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:38,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677645360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:38,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:38,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:38,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304002107] [2021-06-05 22:01:38,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:38,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:38,516 INFO L87 Difference]: Start difference. First operand 689 states and 2298 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:38,947 INFO L93 Difference]: Finished difference Result 878 states and 2816 transitions. [2021-06-05 22:01:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:38,948 INFO L225 Difference]: With dead ends: 878 [2021-06-05 22:01:38,948 INFO L226 Difference]: Without dead ends: 863 [2021-06-05 22:01:38,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:01:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-06-05 22:01:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 686. [2021-06-05 22:01:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3386861313868614) internal successors, (2287), 685 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2287 transitions. [2021-06-05 22:01:38,956 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2287 transitions. Word has length 19 [2021-06-05 22:01:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:38,956 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2287 transitions. [2021-06-05 22:01:38,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2287 transitions. [2021-06-05 22:01:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:38,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:38,956 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:39,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2128 [2021-06-05 22:01:39,157 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:39,157 INFO L82 PathProgramCache]: Analyzing trace with hash 655740588, now seen corresponding path program 118 times [2021-06-05 22:01:39,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:39,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554005115] [2021-06-05 22:01:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:39,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:39,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554005115] [2021-06-05 22:01:39,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554005115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:39,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488206750] [2021-06-05 22:01:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:39,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:39,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:39,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:39,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:39,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:39,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:39,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:39,489 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:39,492 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:39,496 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:39,499 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,544 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-05 22:01:39,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:39,545 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-05 22:01:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:39,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488206750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:39,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:39,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:39,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573976770] [2021-06-05 22:01:39,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:39,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:39,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:39,632 INFO L87 Difference]: Start difference. First operand 686 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:40,317 INFO L93 Difference]: Finished difference Result 1022 states and 3167 transitions. [2021-06-05 22:01:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:40,319 INFO L225 Difference]: With dead ends: 1022 [2021-06-05 22:01:40,319 INFO L226 Difference]: Without dead ends: 1007 [2021-06-05 22:01:40,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 714.4ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-06-05 22:01:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 686. [2021-06-05 22:01:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3386861313868614) internal successors, (2287), 685 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2287 transitions. [2021-06-05 22:01:40,327 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2287 transitions. Word has length 19 [2021-06-05 22:01:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:40,327 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2287 transitions. [2021-06-05 22:01:40,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2287 transitions. [2021-06-05 22:01:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:40,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:40,328 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:40,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2144 [2021-06-05 22:01:40,529 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash -356951944, now seen corresponding path program 119 times [2021-06-05 22:01:40,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:40,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851775479] [2021-06-05 22:01:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:40,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851775479] [2021-06-05 22:01:40,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851775479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564278291] [2021-06-05 22:01:40,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:40,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:40,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:40,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:40,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:40,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:40,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:40,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:40,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:40,893 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:40,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:40,900 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:40,903 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:40,907 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:40,910 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:40,913 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:40,916 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:40,918 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,977 INFO L628 ElimStorePlain]: treesize reduction 70, result has 45.7 percent of original size [2021-06-05 22:01:40,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:40,978 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:458, output treesize:59 [2021-06-05 22:01:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:41,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564278291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:41,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:41,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:41,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340967168] [2021-06-05 22:01:41,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:41,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:41,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:41,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:41,083 INFO L87 Difference]: Start difference. First operand 686 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:42,247 INFO L93 Difference]: Finished difference Result 1128 states and 3408 transitions. [2021-06-05 22:01:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:01:42,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:42,249 INFO L225 Difference]: With dead ends: 1128 [2021-06-05 22:01:42,249 INFO L226 Difference]: Without dead ends: 1049 [2021-06-05 22:01:42,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1169.0ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:01:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-05 22:01:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 698. [2021-06-05 22:01:42,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.340028694404591) internal successors, (2328), 697 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2328 transitions. [2021-06-05 22:01:42,258 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2328 transitions. Word has length 19 [2021-06-05 22:01:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:42,258 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 2328 transitions. [2021-06-05 22:01:42,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2328 transitions. [2021-06-05 22:01:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:42,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:42,259 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:42,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2161,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:42,459 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2094087908, now seen corresponding path program 120 times [2021-06-05 22:01:42,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:42,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811623500] [2021-06-05 22:01:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:42,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:42,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811623500] [2021-06-05 22:01:42,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811623500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:42,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80649656] [2021-06-05 22:01:42,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:42,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:42,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:42,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:42,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:42,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:42,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:42,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:42,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:42,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:42,880 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:42,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:42,886 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:42,888 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,923 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-06-05 22:01:42,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:42,924 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:240, output treesize:43 [2021-06-05 22:01:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:42,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80649656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:42,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:42,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:42,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551587953] [2021-06-05 22:01:42,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:42,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:42,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:42,969 INFO L87 Difference]: Start difference. First operand 698 states and 2328 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:43,602 INFO L93 Difference]: Finished difference Result 905 states and 2904 transitions. [2021-06-05 22:01:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:01:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:43,603 INFO L225 Difference]: With dead ends: 905 [2021-06-05 22:01:43,604 INFO L226 Difference]: Without dead ends: 890 [2021-06-05 22:01:43,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:01:43,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-06-05 22:01:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 705. [2021-06-05 22:01:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.3423295454545454) internal successors, (2353), 704 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2353 transitions. [2021-06-05 22:01:43,611 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2353 transitions. Word has length 19 [2021-06-05 22:01:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:43,611 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2353 transitions. [2021-06-05 22:01:43,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2353 transitions. [2021-06-05 22:01:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:43,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:43,612 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:43,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:43,812 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash 760441070, now seen corresponding path program 121 times [2021-06-05 22:01:43,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:43,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515733353] [2021-06-05 22:01:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:43,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:43,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515733353] [2021-06-05 22:01:43,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515733353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:43,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096364763] [2021-06-05 22:01:43,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:43,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:01:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:44,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:44,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:44,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:44,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:44,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:44,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:44,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:44,153 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:44,156 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:44,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:44,163 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:44,166 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:44,169 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:44,233 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-05 22:01:44,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:44,234 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 22:01:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:44,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096364763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:44,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:44,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:44,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001480578] [2021-06-05 22:01:44,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:44,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:44,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:44,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:44,330 INFO L87 Difference]: Start difference. First operand 705 states and 2353 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:44,961 INFO L93 Difference]: Finished difference Result 967 states and 3033 transitions. [2021-06-05 22:01:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:44,963 INFO L225 Difference]: With dead ends: 967 [2021-06-05 22:01:44,963 INFO L226 Difference]: Without dead ends: 924 [2021-06-05 22:01:44,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:01:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-05 22:01:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 708. [2021-06-05 22:01:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.3394625176803396) internal successors, (2361), 707 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2361 transitions. [2021-06-05 22:01:44,971 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2361 transitions. Word has length 19 [2021-06-05 22:01:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:44,971 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2361 transitions. [2021-06-05 22:01:44,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2361 transitions. [2021-06-05 22:01:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:44,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:44,972 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:45,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:45,172 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1385729690, now seen corresponding path program 122 times [2021-06-05 22:01:45,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:45,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736577194] [2021-06-05 22:01:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:45,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:45,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736577194] [2021-06-05 22:01:45,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736577194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:45,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122301597] [2021-06-05 22:01:45,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:45,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:45,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:45,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:45,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:45,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:45,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:45,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:45,505 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,507 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:45,508 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:45,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:45,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:45,517 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:45,520 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:45,523 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,571 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 22:01:45,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:45,572 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:409, output treesize:61 [2021-06-05 22:01:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122301597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:45,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:45,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944302664] [2021-06-05 22:01:45,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:45,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:45,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:45,656 INFO L87 Difference]: Start difference. First operand 708 states and 2361 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:46,270 INFO L93 Difference]: Finished difference Result 934 states and 2969 transitions. [2021-06-05 22:01:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:46,272 INFO L225 Difference]: With dead ends: 934 [2021-06-05 22:01:46,272 INFO L226 Difference]: Without dead ends: 919 [2021-06-05 22:01:46,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:01:46,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-06-05 22:01:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 708. [2021-06-05 22:01:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.3394625176803396) internal successors, (2361), 707 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2361 transitions. [2021-06-05 22:01:46,280 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2361 transitions. Word has length 19 [2021-06-05 22:01:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:46,280 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2361 transitions. [2021-06-05 22:01:46,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2361 transitions. [2021-06-05 22:01:46,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:46,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:46,281 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:46,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-06-05 22:01:46,481 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash -275510810, now seen corresponding path program 123 times [2021-06-05 22:01:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:46,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152165344] [2021-06-05 22:01:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:46,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:46,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152165344] [2021-06-05 22:01:46,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152165344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:46,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596980522] [2021-06-05 22:01:46,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:46,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:01:46,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:46,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:46,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:46,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:46,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:46,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:46,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:46,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:01:46,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:46,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:46,910 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 22:01:46,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:46,911 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 22:01:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:46,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596980522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:46,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:46,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:46,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283580689] [2021-06-05 22:01:46,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:46,978 INFO L87 Difference]: Start difference. First operand 708 states and 2361 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:47,579 INFO L93 Difference]: Finished difference Result 916 states and 2941 transitions. [2021-06-05 22:01:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:47,581 INFO L225 Difference]: With dead ends: 916 [2021-06-05 22:01:47,581 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 22:01:47,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 679.6ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 22:01:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 714. [2021-06-05 22:01:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.347826086956522) internal successors, (2387), 713 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2387 transitions. [2021-06-05 22:01:47,589 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2387 transitions. Word has length 19 [2021-06-05 22:01:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:47,589 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2387 transitions. [2021-06-05 22:01:47,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2387 transitions. [2021-06-05 22:01:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:47,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:47,589 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:47,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:47,790 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1715949128, now seen corresponding path program 124 times [2021-06-05 22:01:47,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:47,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955961125] [2021-06-05 22:01:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:47,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:47,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955961125] [2021-06-05 22:01:47,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955961125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:47,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226779168] [2021-06-05 22:01:47,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:47,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:47,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:47,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:01:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:48,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:48,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:48,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:48,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:48,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:48,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:48,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:48,196 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:48,199 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:48,202 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,262 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-05 22:01:48,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:48,263 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 22:01:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:48,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226779168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:48,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:48,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:48,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897086248] [2021-06-05 22:01:48,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:48,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:48,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:48,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:48,358 INFO L87 Difference]: Start difference. First operand 714 states and 2387 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:48,839 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-05 22:01:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:48,913 INFO L93 Difference]: Finished difference Result 971 states and 3048 transitions. [2021-06-05 22:01:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:01:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:48,915 INFO L225 Difference]: With dead ends: 971 [2021-06-05 22:01:48,915 INFO L226 Difference]: Without dead ends: 928 [2021-06-05 22:01:48,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:01:48,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-06-05 22:01:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 714. [2021-06-05 22:01:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.347826086956522) internal successors, (2387), 713 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2387 transitions. [2021-06-05 22:01:48,923 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2387 transitions. Word has length 19 [2021-06-05 22:01:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:48,923 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2387 transitions. [2021-06-05 22:01:48,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2387 transitions. [2021-06-05 22:01:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:48,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:48,924 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:49,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-06-05 22:01:49,124 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash 907255270, now seen corresponding path program 125 times [2021-06-05 22:01:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:49,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494243352] [2021-06-05 22:01:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:49,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:49,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494243352] [2021-06-05 22:01:49,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494243352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506505091] [2021-06-05 22:01:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:49,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:49,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:49,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:49,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:49,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:49,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:49,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:49,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:49,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:49,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:49,534 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:49,536 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:49,543 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,585 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 22:01:49,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:49,586 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:242, output treesize:55 [2021-06-05 22:01:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:49,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506505091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:49,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:49,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:49,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053862540] [2021-06-05 22:01:49,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:49,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:49,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:49,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:49,664 INFO L87 Difference]: Start difference. First operand 714 states and 2387 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,129 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 22:01:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:50,279 INFO L93 Difference]: Finished difference Result 913 states and 2929 transitions. [2021-06-05 22:01:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:01:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:50,281 INFO L225 Difference]: With dead ends: 913 [2021-06-05 22:01:50,281 INFO L226 Difference]: Without dead ends: 898 [2021-06-05 22:01:50,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:01:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-05 22:01:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 712. [2021-06-05 22:01:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.3445850914205346) internal successors, (2378), 711 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2378 transitions. [2021-06-05 22:01:50,289 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2378 transitions. Word has length 19 [2021-06-05 22:01:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:50,289 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2378 transitions. [2021-06-05 22:01:50,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2378 transitions. [2021-06-05 22:01:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:50,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:50,290 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:50,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2263,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:50,491 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1808334554, now seen corresponding path program 126 times [2021-06-05 22:01:50,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:50,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021796866] [2021-06-05 22:01:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:50,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:50,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021796866] [2021-06-05 22:01:50,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021796866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:50,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977947514] [2021-06-05 22:01:50,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:50,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:01:50,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:50,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:50,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:50,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:50,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:50,894 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:50,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:50,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:50,909 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:50,913 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:50,918 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:50,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:50,927 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:50,931 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:50,935 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:50,939 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:50,944 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:50,947 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:50,951 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:50,955 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:50,959 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:50,964 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:50,967 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:50,971 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:50,975 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:50,979 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:50,983 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:50,987 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:50,990 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:51,147 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-06-05 22:01:51,148 INFO L628 ElimStorePlain]: treesize reduction 291, result has 38.1 percent of original size [2021-06-05 22:01:51,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:01:51,150 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 1 variables, input treesize:1167, output treesize:179 [2021-06-05 22:01:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:51,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977947514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:51,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:51,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:51,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605463427] [2021-06-05 22:01:51,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:51,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:51,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:51,335 INFO L87 Difference]: Start difference. First operand 712 states and 2378 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,795 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 22:01:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:51,988 INFO L93 Difference]: Finished difference Result 973 states and 3089 transitions. [2021-06-05 22:01:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:51,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:51,990 INFO L225 Difference]: With dead ends: 973 [2021-06-05 22:01:51,990 INFO L226 Difference]: Without dead ends: 958 [2021-06-05 22:01:51,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 857.0ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-05 22:01:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 715. [2021-06-05 22:01:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.3515406162464987) internal successors, (2393), 714 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2393 transitions. [2021-06-05 22:01:51,998 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2393 transitions. Word has length 19 [2021-06-05 22:01:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:51,998 INFO L482 AbstractCegarLoop]: Abstraction has 715 states and 2393 transitions. [2021-06-05 22:01:51,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2393 transitions. [2021-06-05 22:01:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:51,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:51,999 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:52,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2280,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:52,200 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:52,200 INFO L82 PathProgramCache]: Analyzing trace with hash -515992154, now seen corresponding path program 127 times [2021-06-05 22:01:52,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:52,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393938190] [2021-06-05 22:01:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:52,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:52,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393938190] [2021-06-05 22:01:52,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393938190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:52,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860236835] [2021-06-05 22:01:52,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:01:52,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:52,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:52,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:52,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,588 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:52,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,597 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:52,601 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:52,605 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,609 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:52,613 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:52,617 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:52,633 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,641 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:52,646 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,650 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:52,654 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,658 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:52,661 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:52,665 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:52,669 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:52,673 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:52,676 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:52,679 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,881 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-05 22:01:52,881 INFO L628 ElimStorePlain]: treesize reduction 72, result has 75.5 percent of original size [2021-06-05 22:01:52,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:01:52,884 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1063, output treesize:222 [2021-06-05 22:01:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:53,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860236835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:53,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:53,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:53,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332697067] [2021-06-05 22:01:53,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:53,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:53,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:53,147 INFO L87 Difference]: Start difference. First operand 715 states and 2393 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:53,771 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:01:54,041 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 22:01:54,390 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 22:01:54,541 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-06-05 22:01:54,895 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 22:01:55,087 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 22:01:55,343 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 22:01:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:55,381 INFO L93 Difference]: Finished difference Result 974 states and 3073 transitions. [2021-06-05 22:01:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:55,382 INFO L225 Difference]: With dead ends: 974 [2021-06-05 22:01:55,382 INFO L226 Difference]: Without dead ends: 952 [2021-06-05 22:01:55,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2384.2ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-05 22:01:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 712. [2021-06-05 22:01:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.3445850914205346) internal successors, (2378), 711 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2378 transitions. [2021-06-05 22:01:55,390 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2378 transitions. Word has length 19 [2021-06-05 22:01:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:55,390 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2378 transitions. [2021-06-05 22:01:55,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2378 transitions. [2021-06-05 22:01:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:55,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:55,391 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:55,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-06-05 22:01:55,599 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash 45289400, now seen corresponding path program 128 times [2021-06-05 22:01:55,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:55,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893093610] [2021-06-05 22:01:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:55,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:55,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893093610] [2021-06-05 22:01:55,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893093610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:55,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736238706] [2021-06-05 22:01:55,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:55,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:55,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:55,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:55,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:55,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:55,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:55,975 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:55,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:55,981 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:55,983 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:56,027 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-05 22:01:56,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:01:56,029 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-05 22:01:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:56,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736238706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:56,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:56,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:56,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666310722] [2021-06-05 22:01:56,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:56,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:56,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:56,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:56,123 INFO L87 Difference]: Start difference. First operand 712 states and 2378 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:56,609 INFO L93 Difference]: Finished difference Result 1031 states and 3231 transitions. [2021-06-05 22:01:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:01:56,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:56,611 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 22:01:56,611 INFO L226 Difference]: Without dead ends: 1016 [2021-06-05 22:01:56,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:01:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-05 22:01:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 715. [2021-06-05 22:01:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.3515406162464987) internal successors, (2393), 714 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2393 transitions. [2021-06-05 22:01:56,620 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2393 transitions. Word has length 19 [2021-06-05 22:01:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:56,620 INFO L482 AbstractCegarLoop]: Abstraction has 715 states and 2393 transitions. [2021-06-05 22:01:56,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2393 transitions. [2021-06-05 22:01:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:56,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:56,621 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:56,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2322,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:56,825 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash 796689838, now seen corresponding path program 129 times [2021-06-05 22:01:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:56,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635739002] [2021-06-05 22:01:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:56,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635739002] [2021-06-05 22:01:56,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635739002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490978669] [2021-06-05 22:01:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:57,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:57,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:57,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:57,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:57,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:57,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:57,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:57,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:57,164 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:57,168 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:57,172 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:57,176 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:57,180 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:57,184 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:57,188 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:57,192 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:57,195 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:57,199 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:57,203 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:57,206 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:57,210 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:57,213 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:57,217 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:57,220 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:57,224 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,372 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 22:01:57,373 INFO L628 ElimStorePlain]: treesize reduction 64, result has 74.2 percent of original size [2021-06-05 22:01:57,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:01:57,375 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:927, output treesize:184 [2021-06-05 22:01:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:57,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490978669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:57,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:57,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:57,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800307225] [2021-06-05 22:01:57,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:57,567 INFO L87 Difference]: Start difference. First operand 715 states and 2393 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:58,121 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 22:01:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:58,329 INFO L93 Difference]: Finished difference Result 963 states and 3076 transitions. [2021-06-05 22:01:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:01:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:01:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:58,331 INFO L225 Difference]: With dead ends: 963 [2021-06-05 22:01:58,331 INFO L226 Difference]: Without dead ends: 948 [2021-06-05 22:01:58,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-06-05 22:01:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 718. [2021-06-05 22:01:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 3.3584379358437935) internal successors, (2408), 717 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2408 transitions. [2021-06-05 22:01:58,340 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2408 transitions. Word has length 19 [2021-06-05 22:01:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:58,340 INFO L482 AbstractCegarLoop]: Abstraction has 718 states and 2408 transitions. [2021-06-05 22:01:58,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2408 transitions. [2021-06-05 22:01:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:01:58,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:58,340 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:58,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:58,541 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1873939690, now seen corresponding path program 130 times [2021-06-05 22:01:58,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:58,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896777027] [2021-06-05 22:01:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:58,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:58,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896777027] [2021-06-05 22:01:58,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896777027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:58,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189968810] [2021-06-05 22:01:58,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:58,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:58,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:58,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:58,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:58,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:58,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:58,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:58,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:58,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:58,905 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:01:58,909 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:58,912 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:58,916 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:01:58,921 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:58,924 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:58,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:58,932 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:01:58,936 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:01:58,939 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:01:58,943 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:01:58,947 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:59,090 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 22:01:59,090 INFO L628 ElimStorePlain]: treesize reduction 68, result has 72.9 percent of original size [2021-06-05 22:01:59,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:01:59,092 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:731, output treesize:183 [2021-06-05 22:01:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189968810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:59,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:59,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:01:59,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196052003] [2021-06-05 22:01:59,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:01:59,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:59,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:01:59,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:01:59,316 INFO L87 Difference]: Start difference. First operand 718 states and 2408 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:59,864 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 22:02:00,012 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 22:02:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:00,163 INFO L93 Difference]: Finished difference Result 930 states and 2995 transitions. [2021-06-05 22:02:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:00,165 INFO L225 Difference]: With dead ends: 930 [2021-06-05 22:02:00,165 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 22:02:00,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 968.6ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:00,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 22:02:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 713. [2021-06-05 22:02:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.348314606741573) internal successors, (2384), 712 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2384 transitions. [2021-06-05 22:02:00,177 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2384 transitions. Word has length 19 [2021-06-05 22:02:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:00,177 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2384 transitions. [2021-06-05 22:02:00,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2384 transitions. [2021-06-05 22:02:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:00,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:00,178 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:00,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:00,378 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1054966886, now seen corresponding path program 131 times [2021-06-05 22:02:00,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:00,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375367797] [2021-06-05 22:02:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:00,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:00,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375367797] [2021-06-05 22:02:00,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375367797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:00,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651692682] [2021-06-05 22:02:00,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:00,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:00,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:00,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:00,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:00,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:00,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:00,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:00,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:00,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:00,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:00,724 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:00,727 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:00,730 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:00,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:00,736 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,783 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 22:02:00,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:00,784 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:409, output treesize:61 [2021-06-05 22:02:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:00,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651692682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:00,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:00,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:00,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760947276] [2021-06-05 22:02:00,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:00,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:00,866 INFO L87 Difference]: Start difference. First operand 713 states and 2384 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:01,704 INFO L93 Difference]: Finished difference Result 1160 states and 3639 transitions. [2021-06-05 22:02:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:01,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:01,706 INFO L225 Difference]: With dead ends: 1160 [2021-06-05 22:02:01,706 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 22:02:01,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 22:02:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 719. [2021-06-05 22:02:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.352367688022284) internal successors, (2407), 718 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2407 transitions. [2021-06-05 22:02:01,716 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2407 transitions. Word has length 19 [2021-06-05 22:02:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:01,716 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2407 transitions. [2021-06-05 22:02:01,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2407 transitions. [2021-06-05 22:02:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:01,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:01,717 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:01,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:01,917 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1227644308, now seen corresponding path program 132 times [2021-06-05 22:02:01,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:01,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828462435] [2021-06-05 22:02:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:02,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828462435] [2021-06-05 22:02:02,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828462435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:02,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789530896] [2021-06-05 22:02:02,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:02,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:02,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:02,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:02,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:02,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:02,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:02,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:02,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:02,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:02,287 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:02,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:02,293 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:02,296 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:02,299 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:02,302 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:02,306 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:02,308 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,357 INFO L628 ElimStorePlain]: treesize reduction 56, result has 52.1 percent of original size [2021-06-05 22:02:02,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:02,358 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:436, output treesize:61 [2021-06-05 22:02:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:02,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789530896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:02,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:02,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:02,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648128329] [2021-06-05 22:02:02,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:02,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:02,451 INFO L87 Difference]: Start difference. First operand 719 states and 2407 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:03,112 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 22:02:03,421 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 22:02:03,567 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-05 22:02:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:03,593 INFO L93 Difference]: Finished difference Result 1114 states and 3533 transitions. [2021-06-05 22:02:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:03,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:03,595 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 22:02:03,595 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 22:02:03,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1194.2ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 22:02:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 722. [2021-06-05 22:02:03,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 3.3592233009708736) internal successors, (2422), 721 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2422 transitions. [2021-06-05 22:02:03,604 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2422 transitions. Word has length 19 [2021-06-05 22:02:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:03,604 INFO L482 AbstractCegarLoop]: Abstraction has 722 states and 2422 transitions. [2021-06-05 22:02:03,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2422 transitions. [2021-06-05 22:02:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:03,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:03,605 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:03,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:03,805 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:03,806 INFO L82 PathProgramCache]: Analyzing trace with hash -476243870, now seen corresponding path program 133 times [2021-06-05 22:02:03,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:03,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621091813] [2021-06-05 22:02:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:03,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:03,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621091813] [2021-06-05 22:02:03,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621091813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:03,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120273709] [2021-06-05 22:02:03,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:04,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:04,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:04,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:04,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:04,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:04,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:04,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:04,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:04,192 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:04,196 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:04,200 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:04,203 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:04,207 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:04,211 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:04,214 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:04,356 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 22:02:04,357 INFO L628 ElimStorePlain]: treesize reduction 68, result has 72.9 percent of original size [2021-06-05 22:02:04,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:04,358 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:559, output treesize:183 [2021-06-05 22:02:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:04,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120273709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:04,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:04,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:04,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721884335] [2021-06-05 22:02:04,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:04,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:04,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:04,549 INFO L87 Difference]: Start difference. First operand 722 states and 2422 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:05,126 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 22:02:05,274 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-05 22:02:05,581 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-05 22:02:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:05,600 INFO L93 Difference]: Finished difference Result 1089 states and 3469 transitions. [2021-06-05 22:02:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:05,602 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 22:02:05,602 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 22:02:05,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1174.5ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 22:02:05,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 727. [2021-06-05 22:02:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.369146005509642) internal successors, (2446), 726 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2446 transitions. [2021-06-05 22:02:05,612 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2446 transitions. Word has length 19 [2021-06-05 22:02:05,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:05,612 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2446 transitions. [2021-06-05 22:02:05,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2446 transitions. [2021-06-05 22:02:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:05,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:05,612 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:05,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-06-05 22:02:05,813 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash 816098530, now seen corresponding path program 134 times [2021-06-05 22:02:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:05,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14250575] [2021-06-05 22:02:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:05,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14250575] [2021-06-05 22:02:05,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14250575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659037173] [2021-06-05 22:02:05,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:06,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:06,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:06,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:06,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:06,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:06,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:06,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:06,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:06,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:06,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:06,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:06,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:06,195 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:06,198 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:06,202 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:06,206 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:06,209 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:06,213 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:06,217 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:06,220 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:06,224 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,372 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 22:02:06,372 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-06-05 22:02:06,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:06,374 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:183 [2021-06-05 22:02:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659037173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:06,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:06,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:06,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069546405] [2021-06-05 22:02:06,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:06,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:06,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:06,595 INFO L87 Difference]: Start difference. First operand 727 states and 2446 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:07,220 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 22:02:07,504 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 22:02:07,734 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 22:02:07,952 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-05 22:02:08,186 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 22:02:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:08,246 INFO L93 Difference]: Finished difference Result 1068 states and 3409 transitions. [2021-06-05 22:02:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:08,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:08,248 INFO L225 Difference]: With dead ends: 1068 [2021-06-05 22:02:08,248 INFO L226 Difference]: Without dead ends: 1053 [2021-06-05 22:02:08,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1759.1ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-05 22:02:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 717. [2021-06-05 22:02:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.35195530726257) internal successors, (2400), 716 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2400 transitions. [2021-06-05 22:02:08,257 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2400 transitions. Word has length 19 [2021-06-05 22:02:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:08,257 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 2400 transitions. [2021-06-05 22:02:08,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2400 transitions. [2021-06-05 22:02:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:08,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:08,258 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:08,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-06-05 22:02:08,458 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:08,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386532, now seen corresponding path program 135 times [2021-06-05 22:02:08,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:08,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652577856] [2021-06-05 22:02:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:08,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:08,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652577856] [2021-06-05 22:02:08,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652577856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:08,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091935369] [2021-06-05 22:02:08,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:08,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:08,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:08,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:08,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:08,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:08,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:08,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:08,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:08,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:08,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:08,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:08,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:08,786 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:08,823 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 22:02:08,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:08,823 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 22:02:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:08,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091935369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:08,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:08,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:08,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915475241] [2021-06-05 22:02:08,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:08,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:08,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:08,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:08,865 INFO L87 Difference]: Start difference. First operand 717 states and 2400 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:09,280 INFO L93 Difference]: Finished difference Result 894 states and 2875 transitions. [2021-06-05 22:02:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:09,282 INFO L225 Difference]: With dead ends: 894 [2021-06-05 22:02:09,282 INFO L226 Difference]: Without dead ends: 879 [2021-06-05 22:02:09,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:02:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-06-05 22:02:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 723. [2021-06-05 22:02:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.350415512465374) internal successors, (2419), 722 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2419 transitions. [2021-06-05 22:02:09,290 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2419 transitions. Word has length 19 [2021-06-05 22:02:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:09,290 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2419 transitions. [2021-06-05 22:02:09,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2419 transitions. [2021-06-05 22:02:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:09,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:09,291 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:09,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2462,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:09,491 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:09,491 INFO L82 PathProgramCache]: Analyzing trace with hash 222948214, now seen corresponding path program 136 times [2021-06-05 22:02:09,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:09,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949855731] [2021-06-05 22:02:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:09,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949855731] [2021-06-05 22:02:09,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949855731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:09,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878052301] [2021-06-05 22:02:09,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:09,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:09,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:02:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:09,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:09,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:09,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:09,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:09,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:09,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:09,834 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:09,837 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:09,841 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:09,844 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,904 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-05 22:02:09,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:09,905 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 22:02:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:10,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878052301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:10,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:10,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:10,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291907489] [2021-06-05 22:02:10,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:10,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:10,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:10,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:10,000 INFO L87 Difference]: Start difference. First operand 723 states and 2419 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:10,551 INFO L93 Difference]: Finished difference Result 901 states and 2877 transitions. [2021-06-05 22:02:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:10,552 INFO L225 Difference]: With dead ends: 901 [2021-06-05 22:02:10,552 INFO L226 Difference]: Without dead ends: 873 [2021-06-05 22:02:10,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-05 22:02:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 726. [2021-06-05 22:02:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.3475862068965516) internal successors, (2427), 725 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2427 transitions. [2021-06-05 22:02:10,560 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2427 transitions. Word has length 19 [2021-06-05 22:02:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:10,560 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2427 transitions. [2021-06-05 22:02:10,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2427 transitions. [2021-06-05 22:02:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:10,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:10,561 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:10,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2472 [2021-06-05 22:02:10,761 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:10,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1923222546, now seen corresponding path program 137 times [2021-06-05 22:02:10,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:10,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362822778] [2021-06-05 22:02:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:10,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:10,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362822778] [2021-06-05 22:02:10,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362822778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:10,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757522775] [2021-06-05 22:02:10,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:10,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:11,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:11,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:11,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:11,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:11,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:11,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:11,091 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:11,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,148 INFO L628 ElimStorePlain]: treesize reduction 31, result has 65.6 percent of original size [2021-06-05 22:02:11,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:11,149 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:238, output treesize:59 [2021-06-05 22:02:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:11,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757522775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:11,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:11,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:11,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810771896] [2021-06-05 22:02:11,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:11,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:11,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:11,238 INFO L87 Difference]: Start difference. First operand 726 states and 2427 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:11,865 INFO L93 Difference]: Finished difference Result 1058 states and 3256 transitions. [2021-06-05 22:02:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:02:11,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:11,867 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 22:02:11,867 INFO L226 Difference]: Without dead ends: 1000 [2021-06-05 22:02:11,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 644.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-05 22:02:11,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 735. [2021-06-05 22:02:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.35149863760218) internal successors, (2460), 734 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2460 transitions. [2021-06-05 22:02:11,876 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2460 transitions. Word has length 19 [2021-06-05 22:02:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:11,876 INFO L482 AbstractCegarLoop]: Abstraction has 735 states and 2460 transitions. [2021-06-05 22:02:11,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2460 transitions. [2021-06-05 22:02:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:11,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:11,877 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:12,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2488 [2021-06-05 22:02:12,077 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash -813003666, now seen corresponding path program 138 times [2021-06-05 22:02:12,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:12,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906088030] [2021-06-05 22:02:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:12,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:12,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906088030] [2021-06-05 22:02:12,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906088030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:12,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481739218] [2021-06-05 22:02:12,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:12,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:12,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:12,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:12,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:12,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:12,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:12,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:12,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:12,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:12,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,482 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 22:02:12,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:12,483 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 22:02:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:12,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481739218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:12,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:12,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:12,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644349048] [2021-06-05 22:02:12,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:12,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:12,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:12,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:12,529 INFO L87 Difference]: Start difference. First operand 735 states and 2460 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:13,045 INFO L93 Difference]: Finished difference Result 950 states and 3036 transitions. [2021-06-05 22:02:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:13,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:13,046 INFO L225 Difference]: With dead ends: 950 [2021-06-05 22:02:13,047 INFO L226 Difference]: Without dead ends: 935 [2021-06-05 22:02:13,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 565.8ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-05 22:02:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 741. [2021-06-05 22:02:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3594594594594596) internal successors, (2486), 740 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2486 transitions. [2021-06-05 22:02:13,055 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2486 transitions. Word has length 19 [2021-06-05 22:02:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:13,055 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2486 transitions. [2021-06-05 22:02:13,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,055 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2486 transitions. [2021-06-05 22:02:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:13,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:13,056 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:13,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2506,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:13,257 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:13,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2041525312, now seen corresponding path program 139 times [2021-06-05 22:02:13,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:13,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882690366] [2021-06-05 22:02:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:13,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882690366] [2021-06-05 22:02:13,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882690366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415075619] [2021-06-05 22:02:13,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:13,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:02:13,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:13,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:13,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:13,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:13,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:13,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:13,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:13,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:13,718 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:13,721 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:13,724 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,784 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-05 22:02:13,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:13,785 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 22:02:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:13,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415075619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:13,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:13,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:13,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580863108] [2021-06-05 22:02:13,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:13,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:13,888 INFO L87 Difference]: Start difference. First operand 741 states and 2486 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:14,428 INFO L93 Difference]: Finished difference Result 952 states and 3034 transitions. [2021-06-05 22:02:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:14,430 INFO L225 Difference]: With dead ends: 952 [2021-06-05 22:02:14,430 INFO L226 Difference]: Without dead ends: 924 [2021-06-05 22:02:14,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-05 22:02:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 738. [2021-06-05 22:02:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.3582089552238807) internal successors, (2475), 737 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2475 transitions. [2021-06-05 22:02:14,438 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2475 transitions. Word has length 19 [2021-06-05 22:02:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:14,438 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2475 transitions. [2021-06-05 22:02:14,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2475 transitions. [2021-06-05 22:02:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:14,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:14,439 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:14,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2516 [2021-06-05 22:02:14,640 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:14,640 INFO L82 PathProgramCache]: Analyzing trace with hash 369762414, now seen corresponding path program 140 times [2021-06-05 22:02:14,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:14,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220755236] [2021-06-05 22:02:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:14,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:14,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220755236] [2021-06-05 22:02:14,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220755236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:14,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328554524] [2021-06-05 22:02:14,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:14,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:14,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:14,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:14,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:15,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:15,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:15,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:15,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:15,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:15,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:15,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:15,036 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:15,039 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:15,042 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:15,046 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:15,049 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,124 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-06-05 22:02:15,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:15,126 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-06-05 22:02:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:15,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328554524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:15,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:15,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:15,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313708046] [2021-06-05 22:02:15,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:15,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:15,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:15,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:15,224 INFO L87 Difference]: Start difference. First operand 738 states and 2475 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:15,830 INFO L93 Difference]: Finished difference Result 1001 states and 3153 transitions. [2021-06-05 22:02:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:15,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:15,831 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:02:15,832 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 22:02:15,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:15,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 22:02:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 740. [2021-06-05 22:02:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.3612990527740187) internal successors, (2484), 739 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2484 transitions. [2021-06-05 22:02:15,840 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2484 transitions. Word has length 19 [2021-06-05 22:02:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:15,840 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2484 transitions. [2021-06-05 22:02:15,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2484 transitions. [2021-06-05 22:02:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:15,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:15,841 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2532,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:16,042 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1587374542, now seen corresponding path program 141 times [2021-06-05 22:02:16,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207162818] [2021-06-05 22:02:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:16,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207162818] [2021-06-05 22:02:16,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207162818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493751527] [2021-06-05 22:02:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:16,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:16,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:16,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:16,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:16,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:16,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:16,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:16,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:16,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:16,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:16,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:16,423 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:16,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:16,430 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:16,433 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:16,436 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,510 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-05 22:02:16,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:16,511 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-05 22:02:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493751527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:16,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:16,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401845070] [2021-06-05 22:02:16,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:16,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:16,609 INFO L87 Difference]: Start difference. First operand 740 states and 2484 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,042 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 22:02:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:17,337 INFO L93 Difference]: Finished difference Result 948 states and 3036 transitions. [2021-06-05 22:02:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:17,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:17,338 INFO L225 Difference]: With dead ends: 948 [2021-06-05 22:02:17,338 INFO L226 Difference]: Without dead ends: 933 [2021-06-05 22:02:17,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-06-05 22:02:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 736. [2021-06-05 22:02:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.3551020408163263) internal successors, (2466), 735 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2466 transitions. [2021-06-05 22:02:17,346 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2466 transitions. Word has length 19 [2021-06-05 22:02:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:17,346 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2466 transitions. [2021-06-05 22:02:17,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2466 transitions. [2021-06-05 22:02:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:17,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:17,347 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:17,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-06-05 22:02:17,548 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1949139886, now seen corresponding path program 142 times [2021-06-05 22:02:17,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:17,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295332682] [2021-06-05 22:02:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:17,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:17,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295332682] [2021-06-05 22:02:17,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295332682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:17,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316174506] [2021-06-05 22:02:17,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:17,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:17,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:17,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:02:17,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:17,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:17,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:17,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:17,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:17,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:17,927 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:17,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:17,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:17,941 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:17,945 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:17,950 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:17,954 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:17,958 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:17,962 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:17,966 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:17,970 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:17,974 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:17,979 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:17,982 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:17,994 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:18,000 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:18,004 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:18,009 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:18,013 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:18,017 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,220 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-05 22:02:18,221 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-06-05 22:02:18,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:02:18,223 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-05 22:02:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:18,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316174506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:18,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:18,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:18,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100894153] [2021-06-05 22:02:18,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:18,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:18,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:18,448 INFO L87 Difference]: Start difference. First operand 736 states and 2466 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,202 INFO L93 Difference]: Finished difference Result 1117 states and 3435 transitions. [2021-06-05 22:02:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:19,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:19,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,204 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 22:02:19,204 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 22:02:19,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 910.3ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 22:02:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 742. [2021-06-05 22:02:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3684210526315788) internal successors, (2496), 741 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2496 transitions. [2021-06-05 22:02:19,213 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2496 transitions. Word has length 19 [2021-06-05 22:02:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,213 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2496 transitions. [2021-06-05 22:02:19,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2496 transitions. [2021-06-05 22:02:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:19,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,214 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2567 [2021-06-05 22:02:19,415 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1053485010, now seen corresponding path program 143 times [2021-06-05 22:02:19,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673155135] [2021-06-05 22:02:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:19,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673155135] [2021-06-05 22:02:19,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673155135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:19,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013509760] [2021-06-05 22:02:19,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:19,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:19,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:19,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:19,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:19,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:19,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:19,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:19,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:19,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:19,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:19,779 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:19,783 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:19,787 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:19,791 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:19,795 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:19,800 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:19,804 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:19,808 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:19,812 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:19,816 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:19,820 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:19,824 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:19,827 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:19,832 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:19,836 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:19,839 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:19,843 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:19,847 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:19,851 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,002 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 22:02:20,002 INFO L628 ElimStorePlain]: treesize reduction 208, result has 46.8 percent of original size [2021-06-05 22:02:20,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:20,004 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:991, output treesize:183 [2021-06-05 22:02:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:20,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013509760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:20,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:20,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:20,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903599343] [2021-06-05 22:02:20,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:20,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:20,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:20,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:20,231 INFO L87 Difference]: Start difference. First operand 742 states and 2496 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:20,795 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 22:02:20,946 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 22:02:21,081 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 22:02:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:21,228 INFO L93 Difference]: Finished difference Result 987 states and 3121 transitions. [2021-06-05 22:02:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:02:21,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:21,229 INFO L225 Difference]: With dead ends: 987 [2021-06-05 22:02:21,229 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 22:02:21,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1107.6ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 22:02:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 740. [2021-06-05 22:02:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.365358592692828) internal successors, (2487), 739 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2487 transitions. [2021-06-05 22:02:21,238 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2487 transitions. Word has length 19 [2021-06-05 22:02:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:21,238 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2487 transitions. [2021-06-05 22:02:21,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2487 transitions. [2021-06-05 22:02:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:21,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:21,239 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:21,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-06-05 22:02:21,440 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash -492203456, now seen corresponding path program 144 times [2021-06-05 22:02:21,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:21,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376136726] [2021-06-05 22:02:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:21,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:21,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376136726] [2021-06-05 22:02:21,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376136726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:21,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074379373] [2021-06-05 22:02:21,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:21,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:21,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:21,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:21,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:21,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:21,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:21,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:21,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,810 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:21,810 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:21,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:21,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:21,819 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,869 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-06-05 22:02:21,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:21,870 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:279, output treesize:61 [2021-06-05 22:02:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:21,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074379373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:21,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:21,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:02:21,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644652940] [2021-06-05 22:02:21,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:02:21,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:21,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:02:21,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:02:21,962 INFO L87 Difference]: Start difference. First operand 740 states and 2487 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:22,474 INFO L93 Difference]: Finished difference Result 1046 states and 3281 transitions. [2021-06-05 22:02:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:22,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:22,476 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 22:02:22,476 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 22:02:22,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 592.0ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:02:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 22:02:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 743. [2021-06-05 22:02:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.371967654986523) internal successors, (2502), 742 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2502 transitions. [2021-06-05 22:02:22,484 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2502 transitions. Word has length 19 [2021-06-05 22:02:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:22,484 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2502 transitions. [2021-06-05 22:02:22,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2502 transitions. [2021-06-05 22:02:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:22,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:22,485 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:22,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2608,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:22,686 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash 259196982, now seen corresponding path program 145 times [2021-06-05 22:02:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:22,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541446] [2021-06-05 22:02:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:22,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:22,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541446] [2021-06-05 22:02:22,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:22,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899457162] [2021-06-05 22:02:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:22,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:23,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:23,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:23,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:23,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:23,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:23,040 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:23,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:23,049 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:23,053 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:23,057 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:23,061 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:23,065 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:23,069 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:23,072 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:23,076 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:23,080 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:23,084 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:23,087 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:23,091 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:23,094 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:23,098 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:23,101 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:23,105 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,249 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 22:02:23,249 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 22:02:23,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:23,251 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 22:02:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:23,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899457162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:23,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:23,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:23,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754522067] [2021-06-05 22:02:23,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:23,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:23,442 INFO L87 Difference]: Start difference. First operand 743 states and 2502 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:24,272 INFO L93 Difference]: Finished difference Result 1255 states and 3870 transitions. [2021-06-05 22:02:24,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:02:24,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:24,274 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 22:02:24,274 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 22:02:24,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 819.0ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:24,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 22:02:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 750. [2021-06-05 22:02:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.391188251001335) internal successors, (2540), 749 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2540 transitions. [2021-06-05 22:02:24,284 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2540 transitions. Word has length 19 [2021-06-05 22:02:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:24,284 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2540 transitions. [2021-06-05 22:02:24,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2540 transitions. [2021-06-05 22:02:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:24,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:24,285 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:24,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2625 [2021-06-05 22:02:24,486 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:24,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1883534750, now seen corresponding path program 146 times [2021-06-05 22:02:24,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:24,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642999323] [2021-06-05 22:02:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:24,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:24,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642999323] [2021-06-05 22:02:24,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642999323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:24,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686388653] [2021-06-05 22:02:24,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:24,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:24,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:24,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:24,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:24,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:24,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:24,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:24,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:24,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:24,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:24,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,823 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:24,824 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:24,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:24,832 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:24,836 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:24,840 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:24,843 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:24,847 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:24,851 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:24,855 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:24,858 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:24,862 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:24,866 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:24,870 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:24,873 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:24,877 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:25,022 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 22:02:25,022 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 22:02:25,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:25,024 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 22:02:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:25,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686388653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:25,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:25,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:25,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033895025] [2021-06-05 22:02:25,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:25,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:25,227 INFO L87 Difference]: Start difference. First operand 750 states and 2540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:25,902 INFO L93 Difference]: Finished difference Result 1001 states and 3185 transitions. [2021-06-05 22:02:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:25,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:25,904 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:02:25,904 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 22:02:25,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 22:02:25,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 744. [2021-06-05 22:02:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.3781965006729475) internal successors, (2510), 743 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2510 transitions. [2021-06-05 22:02:25,913 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2510 transitions. Word has length 19 [2021-06-05 22:02:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:25,913 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2510 transitions. [2021-06-05 22:02:25,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2510 transitions. [2021-06-05 22:02:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:25,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:25,914 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:26,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2644,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:26,114 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2085937374, now seen corresponding path program 147 times [2021-06-05 22:02:26,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:26,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800928347] [2021-06-05 22:02:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:26,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:26,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800928347] [2021-06-05 22:02:26,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800928347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:26,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137255159] [2021-06-05 22:02:26,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:26,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:26,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:26,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:26,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:26,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:26,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:26,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:26,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:26,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:26,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:26,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,548 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 22:02:26,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:26,549 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 22:02:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:26,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137255159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:26,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:26,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:26,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84078951] [2021-06-05 22:02:26,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:26,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:26,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:26,594 INFO L87 Difference]: Start difference. First operand 744 states and 2510 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:26,953 INFO L93 Difference]: Finished difference Result 1000 states and 3206 transitions. [2021-06-05 22:02:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:26,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:26,955 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 22:02:26,955 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 22:02:26,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 465.2ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:02:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 22:02:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 753. [2021-06-05 22:02:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3882978723404253) internal successors, (2548), 752 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-06-05 22:02:26,963 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 19 [2021-06-05 22:02:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:26,963 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-06-05 22:02:26,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-06-05 22:02:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:26,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:26,964 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:27,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2667 [2021-06-05 22:02:27,164 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash 768591604, now seen corresponding path program 148 times [2021-06-05 22:02:27,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:27,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94792131] [2021-06-05 22:02:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:27,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:27,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94792131] [2021-06-05 22:02:27,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94792131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:27,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279214064] [2021-06-05 22:02:27,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:27,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:27,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:02:27,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:27,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:27,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:27,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:27,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:27,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:27,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:27,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:27,552 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:27,555 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:27,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,618 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-05 22:02:27,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:27,619 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 22:02:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:27,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279214064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:27,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:27,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077136867] [2021-06-05 22:02:27,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:27,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:27,711 INFO L87 Difference]: Start difference. First operand 753 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:28,174 INFO L93 Difference]: Finished difference Result 1016 states and 3241 transitions. [2021-06-05 22:02:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:28,176 INFO L225 Difference]: With dead ends: 1016 [2021-06-05 22:02:28,176 INFO L226 Difference]: Without dead ends: 988 [2021-06-05 22:02:28,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:02:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-06-05 22:02:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 750. [2021-06-05 22:02:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3871829105473967) internal successors, (2537), 749 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2537 transitions. [2021-06-05 22:02:28,191 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2537 transitions. Word has length 19 [2021-06-05 22:02:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:28,191 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2537 transitions. [2021-06-05 22:02:28,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2537 transitions. [2021-06-05 22:02:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:28,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:28,192 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:28,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2677 [2021-06-05 22:02:28,395 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:28,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:28,395 INFO L82 PathProgramCache]: Analyzing trace with hash -903171294, now seen corresponding path program 149 times [2021-06-05 22:02:28,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:28,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611270944] [2021-06-05 22:02:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:28,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611270944] [2021-06-05 22:02:28,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611270944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:28,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740053726] [2021-06-05 22:02:28,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:28,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:28,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:28,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:28,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:28,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:28,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:28,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:28,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:02:28,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:28,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:28,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:28,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:28,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:28,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:28,811 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:28,853 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 22:02:28,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:28,854 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-05 22:02:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:28,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740053726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:28,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:28,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:28,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072572536] [2021-06-05 22:02:28,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:28,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:28,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:28,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:28,938 INFO L87 Difference]: Start difference. First operand 750 states and 2537 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:29,613 INFO L93 Difference]: Finished difference Result 1140 states and 3561 transitions. [2021-06-05 22:02:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:02:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:29,615 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 22:02:29,615 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 22:02:29,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 702.8ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 22:02:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 752. [2021-06-05 22:02:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.3901464713715046) internal successors, (2546), 751 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2546 transitions. [2021-06-05 22:02:29,624 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2546 transitions. Word has length 19 [2021-06-05 22:02:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:29,624 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2546 transitions. [2021-06-05 22:02:29,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2546 transitions. [2021-06-05 22:02:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:29,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:29,625 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:29,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-05 22:02:29,825 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:29,825 INFO L82 PathProgramCache]: Analyzing trace with hash 676206178, now seen corresponding path program 150 times [2021-06-05 22:02:29,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:29,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201389154] [2021-06-05 22:02:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:29,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:29,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201389154] [2021-06-05 22:02:29,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201389154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:29,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372405090] [2021-06-05 22:02:29,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:30,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:02:30,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:30,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:30,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:30,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:30,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:30,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:30,191 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:30,195 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:30,199 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:30,203 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:30,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:30,210 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:30,214 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:30,217 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:30,244 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:30,255 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:30,259 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:30,262 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:30,407 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 22:02:30,407 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-06-05 22:02:30,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:30,409 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-05 22:02:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:30,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372405090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:30,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:30,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:30,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012749762] [2021-06-05 22:02:30,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:30,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:30,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:30,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:30,588 INFO L87 Difference]: Start difference. First operand 752 states and 2546 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:30,980 INFO L93 Difference]: Finished difference Result 1055 states and 3350 transitions. [2021-06-05 22:02:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:30,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:30,981 INFO L225 Difference]: With dead ends: 1055 [2021-06-05 22:02:30,981 INFO L226 Difference]: Without dead ends: 1040 [2021-06-05 22:02:30,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 570.4ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:02:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-06-05 22:02:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 753. [2021-06-05 22:02:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.393617021276596) internal successors, (2552), 752 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2552 transitions. [2021-06-05 22:02:30,990 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2552 transitions. Word has length 19 [2021-06-05 22:02:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:30,990 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2552 transitions. [2021-06-05 22:02:30,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2552 transitions. [2021-06-05 22:02:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:30,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:30,991 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:31,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2712 [2021-06-05 22:02:31,191 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:31,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1968548578, now seen corresponding path program 151 times [2021-06-05 22:02:31,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:31,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102661822] [2021-06-05 22:02:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102661822] [2021-06-05 22:02:31,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102661822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781343555] [2021-06-05 22:02:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:31,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:02:31,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:31,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:31,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:31,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:31,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:31,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:31,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:31,573 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:31,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:31,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:31,585 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:31,589 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:31,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:31,596 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:31,599 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:31,603 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:31,607 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:31,610 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:31,614 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:31,617 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,801 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-05 22:02:31,801 INFO L628 ElimStorePlain]: treesize reduction 66, result has 77.1 percent of original size [2021-06-05 22:02:31,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 22:02:31,803 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-05 22:02:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:32,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781343555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:32,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:32,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:32,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045789095] [2021-06-05 22:02:32,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:32,079 INFO L87 Difference]: Start difference. First operand 753 states and 2552 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:32,617 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 22:02:32,800 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 22:02:33,064 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 22:02:33,229 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 22:02:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:33,331 INFO L93 Difference]: Finished difference Result 1126 states and 3545 transitions. [2021-06-05 22:02:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:02:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:33,333 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 22:02:33,333 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 22:02:33,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1394.9ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 22:02:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 750. [2021-06-05 22:02:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3871829105473967) internal successors, (2537), 749 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2537 transitions. [2021-06-05 22:02:33,342 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2537 transitions. Word has length 19 [2021-06-05 22:02:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:33,342 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2537 transitions. [2021-06-05 22:02:33,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2537 transitions. [2021-06-05 22:02:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:33,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:33,343 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:33,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2732,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:33,544 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1242772622, now seen corresponding path program 152 times [2021-06-05 22:02:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:33,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485572817] [2021-06-05 22:02:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:33,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:33,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485572817] [2021-06-05 22:02:33,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485572817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:33,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622283423] [2021-06-05 22:02:33,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:33,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:33,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:33,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:02:33,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:33,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:33,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:33,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:33,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:33,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:33,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:33,887 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:33,890 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,952 INFO L628 ElimStorePlain]: treesize reduction 28, result has 74.8 percent of original size [2021-06-05 22:02:33,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:02:33,953 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:222, output treesize:83 [2021-06-05 22:02:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:34,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622283423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:34,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:34,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:34,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396949428] [2021-06-05 22:02:34,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:34,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:34,118 INFO L87 Difference]: Start difference. First operand 750 states and 2537 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:34,820 INFO L93 Difference]: Finished difference Result 1129 states and 3638 transitions. [2021-06-05 22:02:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:34,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:34,822 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 22:02:34,822 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 22:02:34,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 777.9ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 22:02:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 756. [2021-06-05 22:02:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.394701986754967) internal successors, (2563), 755 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2563 transitions. [2021-06-05 22:02:34,831 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2563 transitions. Word has length 19 [2021-06-05 22:02:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:34,831 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2563 transitions. [2021-06-05 22:02:34,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2563 transitions. [2021-06-05 22:02:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:34,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:34,832 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:35,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:35,032 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:35,032 INFO L82 PathProgramCache]: Analyzing trace with hash 746316214, now seen corresponding path program 153 times [2021-06-05 22:02:35,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:35,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253624140] [2021-06-05 22:02:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:35,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:35,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253624140] [2021-06-05 22:02:35,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253624140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:35,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533798480] [2021-06-05 22:02:35,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:35,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:02:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:35,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:35,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:35,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:35,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:35,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:35,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:35,301 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:35,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:35,307 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:35,310 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:35,313 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:35,316 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:35,319 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,393 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-05 22:02:35,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:35,394 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-05 22:02:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533798480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:35,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:35,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:35,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746062009] [2021-06-05 22:02:35,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:35,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:35,616 INFO L87 Difference]: Start difference. First operand 756 states and 2563 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:36,126 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-05 22:02:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:36,420 INFO L93 Difference]: Finished difference Result 1121 states and 3549 transitions. [2021-06-05 22:02:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:02:36,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:36,422 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 22:02:36,422 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 22:02:36,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 810.2ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 22:02:36,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 764. [2021-06-05 22:02:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.403669724770642) internal successors, (2597), 763 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2597 transitions. [2021-06-05 22:02:36,432 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2597 transitions. Word has length 19 [2021-06-05 22:02:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:36,432 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2597 transitions. [2021-06-05 22:02:36,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2597 transitions. [2021-06-05 22:02:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:36,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:36,433 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:36,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2772 [2021-06-05 22:02:36,633 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2038658614, now seen corresponding path program 154 times [2021-06-05 22:02:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:36,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821248840] [2021-06-05 22:02:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:36,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:36,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821248840] [2021-06-05 22:02:36,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821248840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:36,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371952220] [2021-06-05 22:02:36,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:36,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:36,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:36,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:36,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:36,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:36,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:36,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:36,923 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:36,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:36,929 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:36,932 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:36,935 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:36,938 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:36,941 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,015 INFO L628 ElimStorePlain]: treesize reduction 53, result has 64.4 percent of original size [2021-06-05 22:02:37,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:37,016 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-05 22:02:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:37,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371952220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:37,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:37,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:37,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027094876] [2021-06-05 22:02:37,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:37,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:37,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:37,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:37,264 INFO L87 Difference]: Start difference. First operand 764 states and 2597 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:37,734 INFO L93 Difference]: Finished difference Result 1126 states and 3542 transitions. [2021-06-05 22:02:37,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:37,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:37,736 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 22:02:37,736 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:02:37,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:02:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:02:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 763. [2021-06-05 22:02:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.400262467191601) internal successors, (2591), 762 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2591 transitions. [2021-06-05 22:02:37,745 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2591 transitions. Word has length 19 [2021-06-05 22:02:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:37,745 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2591 transitions. [2021-06-05 22:02:37,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2591 transitions. [2021-06-05 22:02:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:37,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:37,746 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:37,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2788,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:37,947 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:37,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2079330760, now seen corresponding path program 155 times [2021-06-05 22:02:37,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:37,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925850476] [2021-06-05 22:02:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:38,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:38,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925850476] [2021-06-05 22:02:38,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925850476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:38,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399953553] [2021-06-05 22:02:38,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:38,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:38,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:38,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:38,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:38,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:38,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:38,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:38,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:38,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:38,231 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:38,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:38,237 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:38,240 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:38,243 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:38,246 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,324 INFO L628 ElimStorePlain]: treesize reduction 64, result has 61.7 percent of original size [2021-06-05 22:02:38,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:38,325 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:400, output treesize:103 [2021-06-05 22:02:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:38,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399953553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:38,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:38,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:02:38,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424716986] [2021-06-05 22:02:38,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:02:38,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:02:38,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:02:38,502 INFO L87 Difference]: Start difference. First operand 763 states and 2591 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:39,081 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 22:02:39,254 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-06-05 22:02:39,448 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-05 22:02:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:39,633 INFO L93 Difference]: Finished difference Result 1287 states and 3917 transitions. [2021-06-05 22:02:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:02:39,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:39,635 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 22:02:39,635 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 22:02:39,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1126.5ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 22:02:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 754. [2021-06-05 22:02:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3891102257636123) internal successors, (2552), 753 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2552 transitions. [2021-06-05 22:02:39,645 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2552 transitions. Word has length 19 [2021-06-05 22:02:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:39,645 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2552 transitions. [2021-06-05 22:02:39,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2552 transitions. [2021-06-05 22:02:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:39,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:39,646 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:39,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2811 [2021-06-05 22:02:39,847 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:39,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:39,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1316107356, now seen corresponding path program 156 times [2021-06-05 22:02:39,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:39,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225490791] [2021-06-05 22:02:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:40,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:40,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225490791] [2021-06-05 22:02:40,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225490791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:40,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279371799] [2021-06-05 22:02:40,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:40,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:40,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:40,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:40,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:40,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:40,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:40,219 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:40,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:40,226 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:40,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:40,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:40,235 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:40,238 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:40,241 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,317 INFO L628 ElimStorePlain]: treesize reduction 42, result has 71.2 percent of original size [2021-06-05 22:02:40,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:40,318 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:104 [2021-06-05 22:02:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:40,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279371799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:40,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:40,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:40,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882995023] [2021-06-05 22:02:40,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:40,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:40,547 INFO L87 Difference]: Start difference. First operand 754 states and 2552 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:40,863 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 22:02:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:41,131 INFO L93 Difference]: Finished difference Result 1104 states and 3478 transitions. [2021-06-05 22:02:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:02:41,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:41,133 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 22:02:41,133 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 22:02:41,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 723.2ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:02:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 22:02:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 750. [2021-06-05 22:02:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3858477970627505) internal successors, (2536), 749 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2536 transitions. [2021-06-05 22:02:41,142 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2536 transitions. Word has length 19 [2021-06-05 22:02:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:41,142 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2536 transitions. [2021-06-05 22:02:41,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2536 transitions. [2021-06-05 22:02:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:41,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:41,143 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:41,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2832 [2021-06-05 22:02:41,343 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1681207660, now seen corresponding path program 157 times [2021-06-05 22:02:41,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:41,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121965913] [2021-06-05 22:02:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:41,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:41,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121965913] [2021-06-05 22:02:41,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121965913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:41,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568522329] [2021-06-05 22:02:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:41,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:41,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:41,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:41,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:41,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:41,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:41,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:41,684 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:41,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:41,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:41,693 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:41,695 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:41,698 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:41,701 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,745 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-05 22:02:41,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:41,746 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:486, output treesize:61 [2021-06-05 22:02:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:41,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568522329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:41,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:41,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:41,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59943792] [2021-06-05 22:02:41,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:41,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:41,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:41,832 INFO L87 Difference]: Start difference. First operand 750 states and 2536 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:42,438 INFO L93 Difference]: Finished difference Result 1067 states and 3396 transitions. [2021-06-05 22:02:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:42,440 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 22:02:42,440 INFO L226 Difference]: Without dead ends: 1052 [2021-06-05 22:02:42,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 596.5ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-05 22:02:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 756. [2021-06-05 22:02:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.394701986754967) internal successors, (2563), 755 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2563 transitions. [2021-06-05 22:02:42,449 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2563 transitions. Word has length 19 [2021-06-05 22:02:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:42,449 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2563 transitions. [2021-06-05 22:02:42,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2563 transitions. [2021-06-05 22:02:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:42,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:42,450 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:42,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2853 [2021-06-05 22:02:42,651 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1862359198, now seen corresponding path program 158 times [2021-06-05 22:02:42,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:42,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161871274] [2021-06-05 22:02:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:42,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:42,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161871274] [2021-06-05 22:02:42,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161871274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:42,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584933554] [2021-06-05 22:02:42,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:42,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:42,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:42,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:42,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:42,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:42,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:42,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:42,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:42,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:42,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:42,998 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:43,002 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:43,006 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:43,010 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:43,015 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:43,019 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:43,023 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:43,027 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:43,031 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:43,035 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,205 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 22:02:43,205 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 22:02:43,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:43,207 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 22:02:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:43,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584933554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:43,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:43,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:43,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252960725] [2021-06-05 22:02:43,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:43,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:43,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:43,389 INFO L87 Difference]: Start difference. First operand 756 states and 2563 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:43,981 INFO L93 Difference]: Finished difference Result 1104 states and 3486 transitions. [2021-06-05 22:02:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:43,983 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 22:02:43,983 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 22:02:43,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 696.7ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 22:02:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 759. [2021-06-05 22:02:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.401055408970976) internal successors, (2578), 758 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2578 transitions. [2021-06-05 22:02:43,993 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2578 transitions. Word has length 19 [2021-06-05 22:02:43,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:43,993 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2578 transitions. [2021-06-05 22:02:43,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2578 transitions. [2021-06-05 22:02:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:43,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:43,994 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:44,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:44,194 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:44,194 INFO L82 PathProgramCache]: Analyzing trace with hash -238021430, now seen corresponding path program 159 times [2021-06-05 22:02:44,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:44,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059042421] [2021-06-05 22:02:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:44,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:44,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059042421] [2021-06-05 22:02:44,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059042421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:44,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569222436] [2021-06-05 22:02:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:44,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:44,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:44,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:44,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:44,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:44,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:44,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:44,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:44,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:44,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:44,574 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:44,578 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:44,582 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:44,585 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:44,589 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:44,593 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:44,596 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:44,600 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:44,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:44,607 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:44,611 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,763 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 22:02:44,764 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 22:02:44,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:44,766 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 22:02:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:45,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569222436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:45,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:45,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757801821] [2021-06-05 22:02:45,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:45,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:45,021 INFO L87 Difference]: Start difference. First operand 759 states and 2578 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:45,627 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 22:02:45,772 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 22:02:45,905 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 22:02:46,107 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 22:02:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:46,295 INFO L93 Difference]: Finished difference Result 1101 states and 3482 transitions. [2021-06-05 22:02:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:02:46,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:46,297 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 22:02:46,297 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 22:02:46,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1380.2ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 22:02:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 753. [2021-06-05 22:02:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3882978723404253) internal successors, (2548), 752 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-06-05 22:02:46,306 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 19 [2021-06-05 22:02:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:46,306 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-06-05 22:02:46,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-06-05 22:02:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:46,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:46,307 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:46,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-06-05 22:02:46,507 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:46,508 INFO L82 PathProgramCache]: Analyzing trace with hash -102306258, now seen corresponding path program 160 times [2021-06-05 22:02:46,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:46,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607628062] [2021-06-05 22:02:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:46,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:46,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607628062] [2021-06-05 22:02:46,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607628062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:46,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38984661] [2021-06-05 22:02:46,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:46,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:46,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:46,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:46,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:46,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:46,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:46,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:46,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:46,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:46,929 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:46,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:46,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:46,938 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:46,941 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:46,944 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:47,022 INFO L628 ElimStorePlain]: treesize reduction 42, result has 71.2 percent of original size [2021-06-05 22:02:47,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:47,024 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:104 [2021-06-05 22:02:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:47,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38984661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:47,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:47,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:47,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747406711] [2021-06-05 22:02:47,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:47,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:47,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:47,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:47,243 INFO L87 Difference]: Start difference. First operand 753 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:47,780 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 22:02:48,036 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-06-05 22:02:48,172 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-05 22:02:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:48,183 INFO L93 Difference]: Finished difference Result 1117 states and 3560 transitions. [2021-06-05 22:02:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:02:48,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:48,185 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 22:02:48,185 INFO L226 Difference]: Without dead ends: 1102 [2021-06-05 22:02:48,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1106.8ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-06-05 22:02:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 759. [2021-06-05 22:02:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3970976253298155) internal successors, (2575), 758 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2575 transitions. [2021-06-05 22:02:48,194 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2575 transitions. Word has length 19 [2021-06-05 22:02:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:48,195 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2575 transitions. [2021-06-05 22:02:48,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2575 transitions. [2021-06-05 22:02:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:48,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:48,195 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:48,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:48,396 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:48,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1522031510, now seen corresponding path program 161 times [2021-06-05 22:02:48,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:48,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650513176] [2021-06-05 22:02:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:48,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:48,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650513176] [2021-06-05 22:02:48,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650513176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:48,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730788013] [2021-06-05 22:02:48,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:48,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:02:48,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:48,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:48,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:48,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:48,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:48,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:48,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:48,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:48,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:48,778 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:48,781 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:48,784 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:48,787 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:48,862 INFO L628 ElimStorePlain]: treesize reduction 52, result has 66.7 percent of original size [2021-06-05 22:02:48,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:48,863 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:338, output treesize:104 [2021-06-05 22:02:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730788013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:49,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:49,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:49,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390956826] [2021-06-05 22:02:49,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:49,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:49,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:49,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:49,107 INFO L87 Difference]: Start difference. First operand 759 states and 2575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:49,723 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 22:02:49,870 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 22:02:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:49,906 INFO L93 Difference]: Finished difference Result 1130 states and 3590 transitions. [2021-06-05 22:02:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:02:49,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:49,907 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 22:02:49,907 INFO L226 Difference]: Without dead ends: 1115 [2021-06-05 22:02:49,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 969.3ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-05 22:02:49,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 754. [2021-06-05 22:02:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3904382470119523) internal successors, (2553), 753 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2553 transitions. [2021-06-05 22:02:49,916 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2553 transitions. Word has length 19 [2021-06-05 22:02:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:49,916 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2553 transitions. [2021-06-05 22:02:49,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2553 transitions. [2021-06-05 22:02:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:49,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:49,917 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:50,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:50,118 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1732699988, now seen corresponding path program 162 times [2021-06-05 22:02:50,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:50,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159950994] [2021-06-05 22:02:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:50,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:50,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159950994] [2021-06-05 22:02:50,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159950994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:50,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134842173] [2021-06-05 22:02:50,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:50,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:02:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:50,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:50,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:50,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:50,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:50,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:50,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:50,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:50,426 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:50,429 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:50,432 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:50,434 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:50,437 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:50,440 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,513 INFO L628 ElimStorePlain]: treesize reduction 7, result has 93.2 percent of original size [2021-06-05 22:02:50,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:02:50,514 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:352, output treesize:96 [2021-06-05 22:02:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:50,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134842173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:50,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:50,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:50,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504627299] [2021-06-05 22:02:50,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:50,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:50,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:50,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:50,717 INFO L87 Difference]: Start difference. First operand 754 states and 2553 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:51,155 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 22:02:51,492 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 22:02:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:51,938 INFO L93 Difference]: Finished difference Result 1138 states and 3632 transitions. [2021-06-05 22:02:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:02:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:51,939 INFO L225 Difference]: With dead ends: 1138 [2021-06-05 22:02:51,939 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:02:51,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1155.7ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:51,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:02:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 754. [2021-06-05 22:02:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3904382470119523) internal successors, (2553), 753 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2553 transitions. [2021-06-05 22:02:51,949 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2553 transitions. Word has length 19 [2021-06-05 22:02:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:51,949 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2553 transitions. [2021-06-05 22:02:51,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2553 transitions. [2021-06-05 22:02:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:51,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:51,950 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:52,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-06-05 22:02:52,150 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash -288765254, now seen corresponding path program 163 times [2021-06-05 22:02:52,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:52,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416246723] [2021-06-05 22:02:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:52,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416246723] [2021-06-05 22:02:52,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416246723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642884554] [2021-06-05 22:02:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:52,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:52,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:52,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:52,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:52,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:52,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:52,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:52,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:52,509 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:52,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,561 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 22:02:52,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:52,561 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:273, output treesize:61 [2021-06-05 22:02:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:52,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642884554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:52,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:52,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:52,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935174293] [2021-06-05 22:02:52,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:52,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:52,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:52,642 INFO L87 Difference]: Start difference. First operand 754 states and 2553 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:53,534 INFO L93 Difference]: Finished difference Result 1155 states and 3717 transitions. [2021-06-05 22:02:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:53,536 INFO L225 Difference]: With dead ends: 1155 [2021-06-05 22:02:53,536 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 22:02:53,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 886.9ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 22:02:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 760. [2021-06-05 22:02:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.391304347826087) internal successors, (2574), 759 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2574 transitions. [2021-06-05 22:02:53,546 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2574 transitions. Word has length 19 [2021-06-05 22:02:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:53,546 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2574 transitions. [2021-06-05 22:02:53,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2574 transitions. [2021-06-05 22:02:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:53,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:53,547 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:53,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:53,747 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1723590848, now seen corresponding path program 164 times [2021-06-05 22:02:53,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:53,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987442046] [2021-06-05 22:02:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:53,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:53,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987442046] [2021-06-05 22:02:53,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987442046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:53,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618802943] [2021-06-05 22:02:53,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:53,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:53,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:53,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:02:53,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:54,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:54,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:54,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:54,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:54,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:54,204 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:54,207 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:54,210 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:54,213 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:54,216 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:54,272 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-06-05 22:02:54,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:02:54,273 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 22:02:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:54,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618802943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:54,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:54,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:54,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534480212] [2021-06-05 22:02:54,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:54,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:54,374 INFO L87 Difference]: Start difference. First operand 760 states and 2574 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:54,805 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 22:02:54,927 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-05 22:02:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:54,997 INFO L93 Difference]: Finished difference Result 1210 states and 3856 transitions. [2021-06-05 22:02:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:54,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:54,999 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 22:02:54,999 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 22:02:54,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:02:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 22:02:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 766. [2021-06-05 22:02:55,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.3986928104575163) internal successors, (2600), 765 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2600 transitions. [2021-06-05 22:02:55,008 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2600 transitions. Word has length 19 [2021-06-05 22:02:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:55,008 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2600 transitions. [2021-06-05 22:02:55,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2600 transitions. [2021-06-05 22:02:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:55,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:55,009 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:55,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:55,210 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:55,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1819976010, now seen corresponding path program 165 times [2021-06-05 22:02:55,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:55,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858983696] [2021-06-05 22:02:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:55,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:55,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858983696] [2021-06-05 22:02:55,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858983696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819749617] [2021-06-05 22:02:55,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:55,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:55,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:55,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:55,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:55,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:55,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:55,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:55,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:55,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:55,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:55,629 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:55,633 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:55,637 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:55,641 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:55,645 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:55,649 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:55,653 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:55,656 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:55,660 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,805 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 22:02:55,806 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 22:02:55,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:55,807 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 22:02:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:55,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819749617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:55,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:55,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718792892] [2021-06-05 22:02:55,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:55,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:55,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:55,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:55,997 INFO L87 Difference]: Start difference. First operand 766 states and 2600 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:56,636 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 22:02:56,881 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 22:02:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:57,245 INFO L93 Difference]: Finished difference Result 1471 states and 4478 transitions. [2021-06-05 22:02:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:02:57,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:57,247 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 22:02:57,247 INFO L226 Difference]: Without dead ends: 1441 [2021-06-05 22:02:57,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1352.4ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:57,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-06-05 22:02:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 781. [2021-06-05 22:02:57,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4166666666666665) internal successors, (2665), 780 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2665 transitions. [2021-06-05 22:02:57,260 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2665 transitions. Word has length 19 [2021-06-05 22:02:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:57,260 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2665 transitions. [2021-06-05 22:02:57,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2665 transitions. [2021-06-05 22:02:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:57,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:57,261 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:57,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:57,473 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:57,473 INFO L82 PathProgramCache]: Analyzing trace with hash -527633610, now seen corresponding path program 166 times [2021-06-05 22:02:57,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:57,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727176912] [2021-06-05 22:02:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:57,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:57,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727176912] [2021-06-05 22:02:57,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727176912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:57,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886726196] [2021-06-05 22:02:57,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:57,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:57,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:57,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:57,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:57,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:57,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:57,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:57,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:57,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:57,911 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:57,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:57,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:57,922 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:57,925 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:02:57,929 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:02:57,932 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:02:57,936 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:02:57,940 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:02:57,943 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:02:57,946 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:58,085 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 22:02:58,085 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 22:02:58,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:02:58,087 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 22:02:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:58,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886726196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:58,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:58,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:02:58,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057734718] [2021-06-05 22:02:58,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:02:58,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:58,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:02:58,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:02:58,305 INFO L87 Difference]: Start difference. First operand 781 states and 2665 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:58,697 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-05 22:02:58,969 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 22:02:59,234 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 22:02:59,466 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 22:02:59,674 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 22:02:59,906 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 22:02:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:59,961 INFO L93 Difference]: Finished difference Result 1216 states and 3901 transitions. [2021-06-05 22:02:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:02:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:02:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:59,963 INFO L225 Difference]: With dead ends: 1216 [2021-06-05 22:02:59,963 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 22:02:59,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1826.7ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 22:02:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 776. [2021-06-05 22:02:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.410322580645161) internal successors, (2643), 775 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2643 transitions. [2021-06-05 22:02:59,972 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2643 transitions. Word has length 19 [2021-06-05 22:02:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:59,973 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2643 transitions. [2021-06-05 22:02:59,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2643 transitions. [2021-06-05 22:02:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:02:59,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:59,974 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:00,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-06-05 22:03:00,174 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:00,174 INFO L82 PathProgramCache]: Analyzing trace with hash 874968376, now seen corresponding path program 167 times [2021-06-05 22:03:00,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:00,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50818237] [2021-06-05 22:03:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:00,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:00,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50818237] [2021-06-05 22:03:00,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50818237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:00,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8090897] [2021-06-05 22:03:00,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:00,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:00,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:03:00,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:00,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:00,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:00,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:00,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:00,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:00,626 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:00,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:03:00,632 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:00,635 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:00,638 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:00,712 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-05 22:03:00,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:03:00,713 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:337, output treesize:67 [2021-06-05 22:03:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:00,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8090897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:00,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:00,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:03:00,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320652996] [2021-06-05 22:03:00,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:03:00,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:00,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:03:00,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:00,804 INFO L87 Difference]: Start difference. First operand 776 states and 2643 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:01,767 INFO L93 Difference]: Finished difference Result 1217 states and 3838 transitions. [2021-06-05 22:03:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:03:01,767 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:03:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:01,768 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 22:03:01,768 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 22:03:01,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1046.3ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:03:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 22:03:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 782. [2021-06-05 22:03:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.418693982074264) internal successors, (2670), 781 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2670 transitions. [2021-06-05 22:03:01,782 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2670 transitions. Word has length 19 [2021-06-05 22:03:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:01,783 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2670 transitions. [2021-06-05 22:03:01,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2670 transitions. [2021-06-05 22:03:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:03:01,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:01,783 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:01,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-06-05 22:03:01,984 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1626368814, now seen corresponding path program 168 times [2021-06-05 22:03:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:01,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314996299] [2021-06-05 22:03:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:02,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314996299] [2021-06-05 22:03:02,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314996299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047160552] [2021-06-05 22:03:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:02,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:02,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:02,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:02,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:02,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:02,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:02,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:02,466 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:02,469 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:02,473 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:02,477 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:02,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:02,484 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:02,488 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:02,491 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:02,495 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:02,499 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:02,502 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:02,505 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,651 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 22:03:02,651 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 22:03:02,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:03:02,653 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 22:03:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:02,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047160552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:02,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:02,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:03:02,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531895924] [2021-06-05 22:03:02,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:03:02,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:03:02,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:02,841 INFO L87 Difference]: Start difference. First operand 782 states and 2670 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:03,390 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 22:03:03,576 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 22:03:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:03,867 INFO L93 Difference]: Finished difference Result 1347 states and 4170 transitions. [2021-06-05 22:03:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:03:03,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:03:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:03,869 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 22:03:03,869 INFO L226 Difference]: Without dead ends: 1317 [2021-06-05 22:03:03,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1136.6ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:03:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-05 22:03:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 783. [2021-06-05 22:03:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4309462915601023) internal successors, (2683), 782 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2683 transitions. [2021-06-05 22:03:03,881 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2683 transitions. Word has length 19 [2021-06-05 22:03:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:03,881 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2683 transitions. [2021-06-05 22:03:03,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2683 transitions. [2021-06-05 22:03:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:03:03,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:03,882 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:04,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:04,089 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1376256082, now seen corresponding path program 169 times [2021-06-05 22:03:04,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:04,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121533362] [2021-06-05 22:03:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:04,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:04,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121533362] [2021-06-05 22:03:04,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121533362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:04,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975826066] [2021-06-05 22:03:04,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:04,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:04,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:04,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:04,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:04,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:04,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:04,453 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:04,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:04,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:04,465 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:03:04,469 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:04,473 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:04,477 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:04,481 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:04,485 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:04,488 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:04,492 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:04,496 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:04,499 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:04,503 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:04,506 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:03:04,510 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:04,513 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:04,517 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,661 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 22:03:04,661 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 22:03:04,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 22:03:04,663 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 22:03:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:04,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975826066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:04,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:04,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:03:04,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215487833] [2021-06-05 22:03:04,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:03:04,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:04,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:03:04,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:04,878 INFO L87 Difference]: Start difference. First operand 783 states and 2683 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:05,346 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-05 22:03:05,547 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-05 22:03:05,815 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 22:03:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:05,845 INFO L93 Difference]: Finished difference Result 1227 states and 3873 transitions. [2021-06-05 22:03:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:05,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:03:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:05,847 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 22:03:05,847 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 22:03:05,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1148.1ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 22:03:05,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 777. [2021-06-05 22:03:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.4188144329896906) internal successors, (2653), 776 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2653 transitions. [2021-06-05 22:03:05,857 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2653 transitions. Word has length 19 [2021-06-05 22:03:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:05,857 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2653 transitions. [2021-06-05 22:03:05,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2653 transitions. [2021-06-05 22:03:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:03:05,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:05,858 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:06,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3090 [2021-06-05 22:03:06,058 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:06,058 INFO L82 PathProgramCache]: Analyzing trace with hash -908545542, now seen corresponding path program 170 times [2021-06-05 22:03:06,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:06,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989578282] [2021-06-05 22:03:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:06,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989578282] [2021-06-05 22:03:06,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989578282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780165978] [2021-06-05 22:03:06,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:06,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:06,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:06,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:06,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:06,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:03:06,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:06,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:06,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:06,379 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:06,382 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:06,385 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:06,388 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:06,390 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:06,393 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:06,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,474 INFO L628 ElimStorePlain]: treesize reduction 45, result has 69.8 percent of original size [2021-06-05 22:03:06,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:03:06,475 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:376, output treesize:104 [2021-06-05 22:03:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780165978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:06,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:06,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:03:06,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723168458] [2021-06-05 22:03:06,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:03:06,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:06,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:03:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:06,693 INFO L87 Difference]: Start difference. First operand 777 states and 2653 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:07,208 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 22:03:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:07,486 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-06-05 22:03:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:03:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:07,488 INFO L225 Difference]: With dead ends: 1263 [2021-06-05 22:03:07,488 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 22:03:07,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 863.2ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 22:03:07,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 783. [2021-06-05 22:03:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4271099744245523) internal successors, (2680), 782 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2680 transitions. [2021-06-05 22:03:07,498 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2680 transitions. Word has length 19 [2021-06-05 22:03:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:07,498 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2680 transitions. [2021-06-05 22:03:07,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2680 transitions. [2021-06-05 22:03:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:03:07,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:07,499 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:07,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:07,699 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:07,700 INFO L82 PathProgramCache]: Analyzing trace with hash 715792226, now seen corresponding path program 171 times [2021-06-05 22:03:07,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:07,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358740393] [2021-06-05 22:03:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:07,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:07,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358740393] [2021-06-05 22:03:07,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358740393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:07,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529754643] [2021-06-05 22:03:07,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:07,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:07,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:07,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:07,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:07,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:07,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:07,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:07,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:07,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:07,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:08,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:08,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:03:08,007 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:08,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:08,013 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:08,016 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:08,019 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,093 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-05 22:03:08,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:03:08,094 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-05 22:03:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:08,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529754643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:08,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:08,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:03:08,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519501375] [2021-06-05 22:03:08,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:03:08,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:08,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:03:08,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:08,359 INFO L87 Difference]: Start difference. First operand 783 states and 2680 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:08,775 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:03:09,064 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 22:03:09,268 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 22:03:09,475 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 22:03:09,705 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 22:03:09,840 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 22:03:09,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:09,915 INFO L93 Difference]: Finished difference Result 1290 states and 4088 transitions. [2021-06-05 22:03:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:03:09,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:03:09,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:09,917 INFO L225 Difference]: With dead ends: 1290 [2021-06-05 22:03:09,917 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 22:03:09,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1577.2ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:03:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 22:03:09,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 780. [2021-06-05 22:03:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.4210526315789473) internal successors, (2665), 779 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2665 transitions. [2021-06-05 22:03:09,927 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2665 transitions. Word has length 19 [2021-06-05 22:03:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:09,928 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2665 transitions. [2021-06-05 22:03:09,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2665 transitions. [2021-06-05 22:03:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:03:09,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:09,929 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:10,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3135,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:10,129 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash 424469004, now seen corresponding path program 172 times [2021-06-05 22:03:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:10,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372094604] [2021-06-05 22:03:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:10,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372094604] [2021-06-05 22:03:10,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372094604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619984698] [2021-06-05 22:03:10,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:10,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:10,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:10,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:10,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:03:10,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 22:03:10,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:10,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 22:03:10,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:10,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:03:10,401 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 22:03:10,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:03:10,407 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,488 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.3 percent of original size [2021-06-05 22:03:10,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:03:10,489 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:104 [2021-06-05 22:03:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:10,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619984698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:10,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:10,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:03:10,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227281352] [2021-06-05 22:03:10,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:03:10,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:10,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:03:10,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:10,675 INFO L87 Difference]: Start difference. First operand 780 states and 2665 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:11,057 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 22:03:11,274 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 22:03:11,514 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 22:03:11,967 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 22:03:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:11,968 INFO L93 Difference]: Finished difference Result 1248 states and 3944 transitions. [2021-06-05 22:03:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:11,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:03:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:11,970 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 22:03:11,970 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 22:03:11,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1335.2ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 22:03:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 781. [2021-06-05 22:03:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.424358974358974) internal successors, (2671), 780 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2671 transitions. [2021-06-05 22:03:11,979 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2671 transitions. Word has length 19 [2021-06-05 22:03:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:11,979 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2671 transitions. [2021-06-05 22:03:11,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:11,979 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2671 transitions. [2021-06-05 22:03:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:11,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:11,980 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:12,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:12,181 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:12,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:12,181 INFO L82 PathProgramCache]: Analyzing trace with hash -319743032, now seen corresponding path program 2 times [2021-06-05 22:03:12,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:12,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424785165] [2021-06-05 22:03:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:03:12,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:12,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424785165] [2021-06-05 22:03:12,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424785165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:12,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416323221] [2021-06-05 22:03:12,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:12,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:12,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:12,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:12,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:12,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416323221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:12,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:12,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2021-06-05 22:03:12,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492560111] [2021-06-05 22:03:12,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:12,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:12,345 INFO L87 Difference]: Start difference. First operand 781 states and 2671 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:12,842 INFO L93 Difference]: Finished difference Result 1318 states and 4347 transitions. [2021-06-05 22:03:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:03:12,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:12,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:12,844 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 22:03:12,844 INFO L226 Difference]: Without dead ends: 1069 [2021-06-05 22:03:12,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:12,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-05 22:03:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 855. [2021-06-05 22:03:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.4168618266978923) internal successors, (2918), 854 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2918 transitions. [2021-06-05 22:03:12,853 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2918 transitions. Word has length 20 [2021-06-05 22:03:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:12,853 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2918 transitions. [2021-06-05 22:03:12,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2918 transitions. [2021-06-05 22:03:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:12,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:12,854 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:13,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:13,055 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:13,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1544491944, now seen corresponding path program 173 times [2021-06-05 22:03:13,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:13,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504735398] [2021-06-05 22:03:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:13,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504735398] [2021-06-05 22:03:13,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504735398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605097991] [2021-06-05 22:03:13,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:13,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605097991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:13,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:03:13,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482311021] [2021-06-05 22:03:13,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:03:13,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:03:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:03:13,216 INFO L87 Difference]: Start difference. First operand 855 states and 2918 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:13,439 INFO L93 Difference]: Finished difference Result 1161 states and 3732 transitions. [2021-06-05 22:03:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:13,441 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 22:03:13,441 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 22:03:13,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 22:03:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 868. [2021-06-05 22:03:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4140715109573243) internal successors, (2960), 867 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2960 transitions. [2021-06-05 22:03:13,451 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2960 transitions. Word has length 20 [2021-06-05 22:03:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:13,451 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2960 transitions. [2021-06-05 22:03:13,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:13,451 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2960 transitions. [2021-06-05 22:03:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:13,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:13,452 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:13,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3181 [2021-06-05 22:03:13,652 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:13,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1192264290, now seen corresponding path program 174 times [2021-06-05 22:03:13,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:13,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787852666] [2021-06-05 22:03:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787852666] [2021-06-05 22:03:13,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787852666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253246601] [2021-06-05 22:03:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:13,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:13,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:13,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:13,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253246601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:13,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868085040] [2021-06-05 22:03:13,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:13,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:13,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:13,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:13,826 INFO L87 Difference]: Start difference. First operand 868 states and 2960 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:14,065 INFO L93 Difference]: Finished difference Result 1135 states and 3672 transitions. [2021-06-05 22:03:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:14,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:14,067 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 22:03:14,067 INFO L226 Difference]: Without dead ends: 1135 [2021-06-05 22:03:14,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-06-05 22:03:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 871. [2021-06-05 22:03:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-05 22:03:14,076 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-05 22:03:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:14,077 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-05 22:03:14,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-05 22:03:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:14,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:14,078 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:14,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3183,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:14,278 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:14,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1978318310, now seen corresponding path program 175 times [2021-06-05 22:03:14,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:14,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967489693] [2021-06-05 22:03:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:14,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:14,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967489693] [2021-06-05 22:03:14,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967489693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:14,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588547745] [2021-06-05 22:03:14,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:14,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588547745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:14,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:14,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:14,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812115897] [2021-06-05 22:03:14,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:14,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:14,495 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:14,926 INFO L93 Difference]: Finished difference Result 1111 states and 3575 transitions. [2021-06-05 22:03:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:14,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:14,928 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 22:03:14,928 INFO L226 Difference]: Without dead ends: 1104 [2021-06-05 22:03:14,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:03:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-05 22:03:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 884. [2021-06-05 22:03:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.406568516421291) internal successors, (3008), 883 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3008 transitions. [2021-06-05 22:03:14,938 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3008 transitions. Word has length 20 [2021-06-05 22:03:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:14,938 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3008 transitions. [2021-06-05 22:03:14,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3008 transitions. [2021-06-05 22:03:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:14,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:14,939 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:15,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3185 [2021-06-05 22:03:15,139 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash -483906072, now seen corresponding path program 176 times [2021-06-05 22:03:15,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:15,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855114029] [2021-06-05 22:03:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:15,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:15,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855114029] [2021-06-05 22:03:15,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855114029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:15,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67686471] [2021-06-05 22:03:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:15,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:15,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:15,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:15,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67686471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:15,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:15,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:15,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813329571] [2021-06-05 22:03:15,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:15,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:15,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:15,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:15,325 INFO L87 Difference]: Start difference. First operand 884 states and 3008 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:15,656 INFO L93 Difference]: Finished difference Result 1167 states and 3744 transitions. [2021-06-05 22:03:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:15,658 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 22:03:15,658 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 22:03:15,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 22:03:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 884. [2021-06-05 22:03:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.406568516421291) internal successors, (3008), 883 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3008 transitions. [2021-06-05 22:03:15,668 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3008 transitions. Word has length 20 [2021-06-05 22:03:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:15,668 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3008 transitions. [2021-06-05 22:03:15,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3008 transitions. [2021-06-05 22:03:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:15,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:15,669 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:15,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3191,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:15,869 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1977813794, now seen corresponding path program 177 times [2021-06-05 22:03:15,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:15,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823407380] [2021-06-05 22:03:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:15,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:15,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823407380] [2021-06-05 22:03:15,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823407380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:15,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780710931] [2021-06-05 22:03:15,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:15,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:15,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:16,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780710931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:16,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:16,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012171867] [2021-06-05 22:03:16,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:16,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:16,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:16,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:16,044 INFO L87 Difference]: Start difference. First operand 884 states and 3008 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:16,273 INFO L93 Difference]: Finished difference Result 1124 states and 3641 transitions. [2021-06-05 22:03:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:16,275 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 22:03:16,275 INFO L226 Difference]: Without dead ends: 1118 [2021-06-05 22:03:16,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-06-05 22:03:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 884. [2021-06-05 22:03:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.40317100792752) internal successors, (3005), 883 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3005 transitions. [2021-06-05 22:03:16,285 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3005 transitions. Word has length 20 [2021-06-05 22:03:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:16,285 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3005 transitions. [2021-06-05 22:03:16,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3005 transitions. [2021-06-05 22:03:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:16,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:16,286 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:16,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3195 [2021-06-05 22:03:16,487 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:16,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:16,487 INFO L82 PathProgramCache]: Analyzing trace with hash 876210668, now seen corresponding path program 178 times [2021-06-05 22:03:16,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:16,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168698304] [2021-06-05 22:03:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:16,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:16,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168698304] [2021-06-05 22:03:16,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168698304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869865637] [2021-06-05 22:03:16,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:16,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:16,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:16,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:16,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:16,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869865637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:16,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:16,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433103544] [2021-06-05 22:03:16,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:16,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:16,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:16,700 INFO L87 Difference]: Start difference. First operand 884 states and 3005 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:17,004 INFO L93 Difference]: Finished difference Result 1074 states and 3498 transitions. [2021-06-05 22:03:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:17,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:17,006 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 22:03:17,006 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 22:03:17,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 22:03:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 871. [2021-06-05 22:03:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-05 22:03:17,015 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-05 22:03:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:17,016 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-05 22:03:17,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-05 22:03:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:17,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:17,017 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:17,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:17,217 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:17,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163430, now seen corresponding path program 179 times [2021-06-05 22:03:17,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:17,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833604207] [2021-06-05 22:03:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:17,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:17,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833604207] [2021-06-05 22:03:17,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833604207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953070405] [2021-06-05 22:03:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:17,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:17,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:17,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:17,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:17,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953070405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:17,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:17,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745421048] [2021-06-05 22:03:17,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:17,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:17,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:17,419 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:17,637 INFO L93 Difference]: Finished difference Result 1008 states and 3320 transitions. [2021-06-05 22:03:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:17,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:17,639 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 22:03:17,639 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 22:03:17,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 22:03:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 874. [2021-06-05 22:03:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.40893470790378) internal successors, (2976), 873 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2976 transitions. [2021-06-05 22:03:17,648 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2976 transitions. Word has length 20 [2021-06-05 22:03:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:17,648 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2976 transitions. [2021-06-05 22:03:17,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2976 transitions. [2021-06-05 22:03:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:17,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:17,649 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:17,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3205,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:17,850 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash -926805212, now seen corresponding path program 180 times [2021-06-05 22:03:17,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:17,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024615264] [2021-06-05 22:03:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:17,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:17,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024615264] [2021-06-05 22:03:17,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024615264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016782148] [2021-06-05 22:03:17,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:17,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:17,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:18,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016782148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:18,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:18,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:18,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930041469] [2021-06-05 22:03:18,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:18,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:18,037 INFO L87 Difference]: Start difference. First operand 874 states and 2976 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:18,247 INFO L93 Difference]: Finished difference Result 1031 states and 3380 transitions. [2021-06-05 22:03:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:18,249 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 22:03:18,249 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 22:03:18,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 22:03:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 871. [2021-06-05 22:03:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-05 22:03:18,258 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-05 22:03:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:18,258 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-05 22:03:18,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-05 22:03:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:18,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:18,259 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:18,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-05 22:03:18,460 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:18,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1673472592, now seen corresponding path program 181 times [2021-06-05 22:03:18,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:18,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806532391] [2021-06-05 22:03:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:18,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:18,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806532391] [2021-06-05 22:03:18,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806532391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:18,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388570388] [2021-06-05 22:03:18,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:18,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388570388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:18,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:18,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:18,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506738309] [2021-06-05 22:03:18,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:18,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:18,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:18,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:18,643 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:18,912 INFO L93 Difference]: Finished difference Result 1075 states and 3471 transitions. [2021-06-05 22:03:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:18,914 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 22:03:18,914 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 22:03:18,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:03:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 22:03:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 880. [2021-06-05 22:03:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4175199089874857) internal successors, (3004), 879 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3004 transitions. [2021-06-05 22:03:18,924 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3004 transitions. Word has length 20 [2021-06-05 22:03:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:18,924 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3004 transitions. [2021-06-05 22:03:18,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3004 transitions. [2021-06-05 22:03:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:18,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:18,925 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:19,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3212,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:19,126 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:19,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:19,126 INFO L82 PathProgramCache]: Analyzing trace with hash 305325820, now seen corresponding path program 182 times [2021-06-05 22:03:19,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:19,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247606289] [2021-06-05 22:03:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:19,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:19,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247606289] [2021-06-05 22:03:19,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247606289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:19,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165030700] [2021-06-05 22:03:19,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:19,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:19,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:19,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:19,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:19,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165030700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:19,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:19,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:19,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270523505] [2021-06-05 22:03:19,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:19,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:19,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:19,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:19,324 INFO L87 Difference]: Start difference. First operand 880 states and 3004 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:19,556 INFO L93 Difference]: Finished difference Result 1003 states and 3305 transitions. [2021-06-05 22:03:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:19,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:19,558 INFO L225 Difference]: With dead ends: 1003 [2021-06-05 22:03:19,558 INFO L226 Difference]: Without dead ends: 991 [2021-06-05 22:03:19,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-06-05 22:03:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 880. [2021-06-05 22:03:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-05 22:03:19,567 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-05 22:03:19,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:19,567 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-05 22:03:19,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-05 22:03:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:19,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:19,568 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:19,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:19,768 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash 475323944, now seen corresponding path program 183 times [2021-06-05 22:03:19,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:19,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155061047] [2021-06-05 22:03:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:19,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:19,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155061047] [2021-06-05 22:03:19,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155061047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:19,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178773613] [2021-06-05 22:03:19,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:19,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:19,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:19,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:19,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:19,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178773613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:19,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:19,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:19,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746410999] [2021-06-05 22:03:19,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:19,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:19,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:19,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:19,958 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:20,151 INFO L93 Difference]: Finished difference Result 1012 states and 3329 transitions. [2021-06-05 22:03:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:20,153 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 22:03:20,153 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 22:03:20,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 22:03:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 874. [2021-06-05 22:03:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.40893470790378) internal successors, (2976), 873 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2976 transitions. [2021-06-05 22:03:20,162 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2976 transitions. Word has length 20 [2021-06-05 22:03:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:20,162 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2976 transitions. [2021-06-05 22:03:20,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2976 transitions. [2021-06-05 22:03:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:20,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:20,163 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:20,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3221 [2021-06-05 22:03:20,363 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:20,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1887721840, now seen corresponding path program 184 times [2021-06-05 22:03:20,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:20,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171561210] [2021-06-05 22:03:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:20,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:20,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171561210] [2021-06-05 22:03:20,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171561210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:20,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887688573] [2021-06-05 22:03:20,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:20,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:20,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:20,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:20,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:20,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887688573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:20,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:20,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:20,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270304017] [2021-06-05 22:03:20,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:20,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:20,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:20,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:20,565 INFO L87 Difference]: Start difference. First operand 874 states and 2976 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:20,845 INFO L93 Difference]: Finished difference Result 1001 states and 3278 transitions. [2021-06-05 22:03:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:20,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:20,847 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 22:03:20,847 INFO L226 Difference]: Without dead ends: 987 [2021-06-05 22:03:20,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-05 22:03:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 874. [2021-06-05 22:03:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4054982817869415) internal successors, (2973), 873 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2973 transitions. [2021-06-05 22:03:20,856 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2973 transitions. Word has length 20 [2021-06-05 22:03:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:20,856 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2973 transitions. [2021-06-05 22:03:20,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2973 transitions. [2021-06-05 22:03:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:20,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:20,857 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:21,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:21,058 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash -470577356, now seen corresponding path program 185 times [2021-06-05 22:03:21,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:21,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168674504] [2021-06-05 22:03:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:21,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:21,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168674504] [2021-06-05 22:03:21,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168674504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:21,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461744070] [2021-06-05 22:03:21,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:21,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:21,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461744070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:21,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:21,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:21,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124393695] [2021-06-05 22:03:21,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:21,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:21,251 INFO L87 Difference]: Start difference. First operand 874 states and 2973 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:21,449 INFO L93 Difference]: Finished difference Result 1011 states and 3308 transitions. [2021-06-05 22:03:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:21,451 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 22:03:21,451 INFO L226 Difference]: Without dead ends: 1011 [2021-06-05 22:03:21,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-06-05 22:03:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 871. [2021-06-05 22:03:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-05 22:03:21,460 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-05 22:03:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:21,460 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-05 22:03:21,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-05 22:03:21,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:21,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:21,461 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:21,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-06-05 22:03:21,661 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2049796036, now seen corresponding path program 186 times [2021-06-05 22:03:21,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:21,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394486218] [2021-06-05 22:03:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:21,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:21,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394486218] [2021-06-05 22:03:21,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394486218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:21,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475128224] [2021-06-05 22:03:21,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:21,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:21,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:21,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:21,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475128224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:21,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:21,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:21,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650752352] [2021-06-05 22:03:21,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:21,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:21,851 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:22,092 INFO L93 Difference]: Finished difference Result 1030 states and 3364 transitions. [2021-06-05 22:03:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:22,094 INFO L225 Difference]: With dead ends: 1030 [2021-06-05 22:03:22,094 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 22:03:22,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 22:03:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 871. [2021-06-05 22:03:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-05 22:03:22,103 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-05 22:03:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:22,103 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-05 22:03:22,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-05 22:03:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:22,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:22,104 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:22,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:22,305 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1256631376, now seen corresponding path program 187 times [2021-06-05 22:03:22,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:22,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948773892] [2021-06-05 22:03:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:22,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948773892] [2021-06-05 22:03:22,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948773892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895979157] [2021-06-05 22:03:22,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:22,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895979157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:22,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770693926] [2021-06-05 22:03:22,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:22,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:22,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:22,511 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:22,729 INFO L93 Difference]: Finished difference Result 996 states and 3273 transitions. [2021-06-05 22:03:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:22,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:22,730 INFO L225 Difference]: With dead ends: 996 [2021-06-05 22:03:22,730 INFO L226 Difference]: Without dead ends: 996 [2021-06-05 22:03:22,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-05 22:03:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 868. [2021-06-05 22:03:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4071510957324107) internal successors, (2954), 867 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2954 transitions. [2021-06-05 22:03:22,740 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2954 transitions. Word has length 20 [2021-06-05 22:03:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:22,740 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2954 transitions. [2021-06-05 22:03:22,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2954 transitions. [2021-06-05 22:03:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:22,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:22,741 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:22,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3238 [2021-06-05 22:03:22,942 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:22,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:22,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1922977178, now seen corresponding path program 188 times [2021-06-05 22:03:22,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:22,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219660303] [2021-06-05 22:03:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:22,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219660303] [2021-06-05 22:03:22,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219660303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892290238] [2021-06-05 22:03:22,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:23,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:23,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:23,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892290238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:23,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:23,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:23,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745288682] [2021-06-05 22:03:23,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:23,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:23,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:23,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:23,160 INFO L87 Difference]: Start difference. First operand 868 states and 2954 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:23,361 INFO L93 Difference]: Finished difference Result 1048 states and 3390 transitions. [2021-06-05 22:03:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:23,363 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 22:03:23,363 INFO L226 Difference]: Without dead ends: 1041 [2021-06-05 22:03:23,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-06-05 22:03:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 887. [2021-06-05 22:03:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.404063205417607) internal successors, (3016), 886 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3016 transitions. [2021-06-05 22:03:23,373 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3016 transitions. Word has length 20 [2021-06-05 22:03:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:23,373 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3016 transitions. [2021-06-05 22:03:23,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3016 transitions. [2021-06-05 22:03:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:23,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:23,374 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:23,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:23,575 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash 138387140, now seen corresponding path program 189 times [2021-06-05 22:03:23,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:23,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645290471] [2021-06-05 22:03:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:23,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645290471] [2021-06-05 22:03:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645290471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:23,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776440852] [2021-06-05 22:03:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:23,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:23,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:23,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776440852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:23,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:23,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:23,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788808005] [2021-06-05 22:03:23,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:23,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:23,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:23,781 INFO L87 Difference]: Start difference. First operand 887 states and 3016 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:24,005 INFO L93 Difference]: Finished difference Result 1045 states and 3392 transitions. [2021-06-05 22:03:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:24,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:24,007 INFO L225 Difference]: With dead ends: 1045 [2021-06-05 22:03:24,007 INFO L226 Difference]: Without dead ends: 1045 [2021-06-05 22:03:24,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-05 22:03:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 887. [2021-06-05 22:03:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.404063205417607) internal successors, (3016), 886 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3016 transitions. [2021-06-05 22:03:24,017 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3016 transitions. Word has length 20 [2021-06-05 22:03:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:24,017 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3016 transitions. [2021-06-05 22:03:24,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3016 transitions. [2021-06-05 22:03:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:24,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:24,018 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:24,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3249,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:24,225 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1922472662, now seen corresponding path program 190 times [2021-06-05 22:03:24,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:24,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435571735] [2021-06-05 22:03:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:24,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435571735] [2021-06-05 22:03:24,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435571735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899587413] [2021-06-05 22:03:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:24,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:24,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:24,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:24,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:24,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899587413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:24,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:24,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:24,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869199801] [2021-06-05 22:03:24,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:24,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:24,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:24,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:24,420 INFO L87 Difference]: Start difference. First operand 887 states and 3016 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:24,712 INFO L93 Difference]: Finished difference Result 1051 states and 3399 transitions. [2021-06-05 22:03:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:24,714 INFO L225 Difference]: With dead ends: 1051 [2021-06-05 22:03:24,714 INFO L226 Difference]: Without dead ends: 1045 [2021-06-05 22:03:24,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-05 22:03:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 887. [2021-06-05 22:03:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.4006772009029347) internal successors, (3013), 886 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3013 transitions. [2021-06-05 22:03:24,724 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3013 transitions. Word has length 20 [2021-06-05 22:03:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:24,724 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3013 transitions. [2021-06-05 22:03:24,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3013 transitions. [2021-06-05 22:03:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:24,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:24,725 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:24,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3256 [2021-06-05 22:03:24,925 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 931551800, now seen corresponding path program 191 times [2021-06-05 22:03:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:24,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330654946] [2021-06-05 22:03:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:24,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:24,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330654946] [2021-06-05 22:03:24,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330654946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:24,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229449262] [2021-06-05 22:03:24,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:25,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:25,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:25,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:25,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:25,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229449262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:25,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:25,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:25,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773117671] [2021-06-05 22:03:25,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:25,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:25,136 INFO L87 Difference]: Start difference. First operand 887 states and 3013 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:25,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:25,402 INFO L93 Difference]: Finished difference Result 1050 states and 3400 transitions. [2021-06-05 22:03:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:25,404 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 22:03:25,404 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 22:03:25,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 22:03:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 884. [2021-06-05 22:03:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.40317100792752) internal successors, (3005), 883 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3005 transitions. [2021-06-05 22:03:25,414 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3005 transitions. Word has length 20 [2021-06-05 22:03:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:25,414 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3005 transitions. [2021-06-05 22:03:25,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3005 transitions. [2021-06-05 22:03:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:25,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:25,415 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:25,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3263 [2021-06-05 22:03:25,615 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1384617084, now seen corresponding path program 192 times [2021-06-05 22:03:25,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:25,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253421362] [2021-06-05 22:03:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:25,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:25,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253421362] [2021-06-05 22:03:25,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253421362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:25,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071208914] [2021-06-05 22:03:25,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:25,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:25,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:25,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071208914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:25,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:25,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670059020] [2021-06-05 22:03:25,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:25,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:25,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:25,819 INFO L87 Difference]: Start difference. First operand 884 states and 3005 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:26,042 INFO L93 Difference]: Finished difference Result 1009 states and 3304 transitions. [2021-06-05 22:03:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:26,042 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:26,043 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 22:03:26,043 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 22:03:26,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 22:03:26,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 884. [2021-06-05 22:03:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.3997734994337487) internal successors, (3002), 883 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3002 transitions. [2021-06-05 22:03:26,052 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3002 transitions. Word has length 20 [2021-06-05 22:03:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:26,052 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3002 transitions. [2021-06-05 22:03:26,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3002 transitions. [2021-06-05 22:03:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:26,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:26,053 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:26,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:26,261 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:26,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1214618960, now seen corresponding path program 193 times [2021-06-05 22:03:26,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:26,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089033828] [2021-06-05 22:03:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:26,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:26,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089033828] [2021-06-05 22:03:26,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089033828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:26,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834397437] [2021-06-05 22:03:26,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:26,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:26,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:26,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834397437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:26,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:26,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:26,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392707135] [2021-06-05 22:03:26,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:26,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:26,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:26,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:26,450 INFO L87 Difference]: Start difference. First operand 884 states and 3002 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:26,655 INFO L93 Difference]: Finished difference Result 1011 states and 3313 transitions. [2021-06-05 22:03:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:26,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:26,656 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 22:03:26,656 INFO L226 Difference]: Without dead ends: 1011 [2021-06-05 22:03:26,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-06-05 22:03:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 871. [2021-06-05 22:03:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-05 22:03:26,666 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-05 22:03:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:26,666 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-05 22:03:26,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-05 22:03:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:26,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:26,667 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:26,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-06-05 22:03:26,867 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1043292698, now seen corresponding path program 194 times [2021-06-05 22:03:26,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:26,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341037548] [2021-06-05 22:03:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:26,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:26,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341037548] [2021-06-05 22:03:26,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341037548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:26,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25022713] [2021-06-05 22:03:26,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:26,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:26,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:26,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:26,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:27,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25022713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:27,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:27,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403366401] [2021-06-05 22:03:27,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:27,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:27,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:27,044 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:27,295 INFO L93 Difference]: Finished difference Result 1151 states and 3681 transitions. [2021-06-05 22:03:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:27,297 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 22:03:27,297 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 22:03:27,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 22:03:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 893. [2021-06-05 22:03:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4024663677130045) internal successors, (3035), 892 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3035 transitions. [2021-06-05 22:03:27,307 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3035 transitions. Word has length 20 [2021-06-05 22:03:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:27,307 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3035 transitions. [2021-06-05 22:03:27,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3035 transitions. [2021-06-05 22:03:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:27,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:27,308 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:27,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-06-05 22:03:27,508 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1190310280, now seen corresponding path program 195 times [2021-06-05 22:03:27,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:27,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077557863] [2021-06-05 22:03:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:27,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:27,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077557863] [2021-06-05 22:03:27,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077557863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784676178] [2021-06-05 22:03:27,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:27,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:27,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:27,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:27,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784676178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:27,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:27,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815733202] [2021-06-05 22:03:27,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:27,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:27,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:27,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:27,725 INFO L87 Difference]: Start difference. First operand 893 states and 3035 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:28,019 INFO L93 Difference]: Finished difference Result 1136 states and 3648 transitions. [2021-06-05 22:03:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:28,021 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:03:28,021 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 22:03:28,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 22:03:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 893. [2021-06-05 22:03:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4024663677130045) internal successors, (3035), 892 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3035 transitions. [2021-06-05 22:03:28,031 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3035 transitions. Word has length 20 [2021-06-05 22:03:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:28,031 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3035 transitions. [2021-06-05 22:03:28,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3035 transitions. [2021-06-05 22:03:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:28,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:28,032 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:28,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:28,233 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:28,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1043797214, now seen corresponding path program 196 times [2021-06-05 22:03:28,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:28,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030385830] [2021-06-05 22:03:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:28,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:28,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030385830] [2021-06-05 22:03:28,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030385830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:28,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229263426] [2021-06-05 22:03:28,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:28,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:28,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:28,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:28,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229263426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:28,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:28,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:28,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089285800] [2021-06-05 22:03:28,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:28,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:28,458 INFO L87 Difference]: Start difference. First operand 893 states and 3035 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:28,811 INFO L93 Difference]: Finished difference Result 1142 states and 3655 transitions. [2021-06-05 22:03:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:28,813 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 22:03:28,813 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 22:03:28,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 365.3ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 22:03:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 893. [2021-06-05 22:03:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.399103139013453) internal successors, (3032), 892 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3032 transitions. [2021-06-05 22:03:28,828 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3032 transitions. Word has length 20 [2021-06-05 22:03:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:28,828 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3032 transitions. [2021-06-05 22:03:28,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3032 transitions. [2021-06-05 22:03:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:28,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:28,829 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:29,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-06-05 22:03:29,030 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:29,030 INFO L82 PathProgramCache]: Analyzing trace with hash -397145620, now seen corresponding path program 197 times [2021-06-05 22:03:29,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:29,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684527837] [2021-06-05 22:03:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:29,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:29,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684527837] [2021-06-05 22:03:29,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684527837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:29,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142098083] [2021-06-05 22:03:29,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:29,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:29,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:29,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142098083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:29,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:29,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:29,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686484954] [2021-06-05 22:03:29,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:29,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:29,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:29,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:29,211 INFO L87 Difference]: Start difference. First operand 893 states and 3032 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:29,489 INFO L93 Difference]: Finished difference Result 1153 states and 3691 transitions. [2021-06-05 22:03:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:29,491 INFO L225 Difference]: With dead ends: 1153 [2021-06-05 22:03:29,491 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 22:03:29,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 22:03:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 890. [2021-06-05 22:03:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4015748031496065) internal successors, (3024), 889 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3024 transitions. [2021-06-05 22:03:29,501 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3024 transitions. Word has length 20 [2021-06-05 22:03:29,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:29,501 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3024 transitions. [2021-06-05 22:03:29,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3024 transitions. [2021-06-05 22:03:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:29,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:29,502 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:29,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-06-05 22:03:29,703 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:29,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1581652792, now seen corresponding path program 198 times [2021-06-05 22:03:29,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:29,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809071432] [2021-06-05 22:03:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:29,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:29,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809071432] [2021-06-05 22:03:29,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809071432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:29,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182985157] [2021-06-05 22:03:29,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:29,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:29,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182985157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:29,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:29,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:29,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656090309] [2021-06-05 22:03:29,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:29,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:29,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:29,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:29,929 INFO L87 Difference]: Start difference. First operand 890 states and 3024 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:30,224 INFO L93 Difference]: Finished difference Result 1106 states and 3573 transitions. [2021-06-05 22:03:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:30,226 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 22:03:30,226 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 22:03:30,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 22:03:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 890. [2021-06-05 22:03:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.3982002249718786) internal successors, (3021), 889 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3021 transitions. [2021-06-05 22:03:30,235 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3021 transitions. Word has length 20 [2021-06-05 22:03:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:30,236 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3021 transitions. [2021-06-05 22:03:30,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3021 transitions. [2021-06-05 22:03:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:30,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:30,237 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:30,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-06-05 22:03:30,437 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1751650916, now seen corresponding path program 199 times [2021-06-05 22:03:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:30,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791621921] [2021-06-05 22:03:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:30,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:30,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791621921] [2021-06-05 22:03:30,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791621921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:30,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364456112] [2021-06-05 22:03:30,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:30,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:30,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364456112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:30,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:30,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:30,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186864133] [2021-06-05 22:03:30,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:30,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:30,612 INFO L87 Difference]: Start difference. First operand 890 states and 3021 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:30,852 INFO L93 Difference]: Finished difference Result 1139 states and 3670 transitions. [2021-06-05 22:03:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:30,853 INFO L225 Difference]: With dead ends: 1139 [2021-06-05 22:03:30,853 INFO L226 Difference]: Without dead ends: 1139 [2021-06-05 22:03:30,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-05 22:03:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 887. [2021-06-05 22:03:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.4006772009029347) internal successors, (3013), 886 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3013 transitions. [2021-06-05 22:03:30,864 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3013 transitions. Word has length 20 [2021-06-05 22:03:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:30,864 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3013 transitions. [2021-06-05 22:03:30,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3013 transitions. [2021-06-05 22:03:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:30,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:30,865 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:31,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:31,065 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2125569182, now seen corresponding path program 200 times [2021-06-05 22:03:31,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:31,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255615333] [2021-06-05 22:03:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:31,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255615333] [2021-06-05 22:03:31,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255615333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492547134] [2021-06-05 22:03:31,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:31,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:31,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:31,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492547134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:31,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:31,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463554131] [2021-06-05 22:03:31,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:31,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:31,255 INFO L87 Difference]: Start difference. First operand 887 states and 3013 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:31,521 INFO L93 Difference]: Finished difference Result 1097 states and 3549 transitions. [2021-06-05 22:03:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:31,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:31,522 INFO L225 Difference]: With dead ends: 1097 [2021-06-05 22:03:31,522 INFO L226 Difference]: Without dead ends: 1079 [2021-06-05 22:03:31,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:03:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-05 22:03:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 887. [2021-06-05 22:03:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.3972911963882617) internal successors, (3010), 886 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3010 transitions. [2021-06-05 22:03:31,532 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3010 transitions. Word has length 20 [2021-06-05 22:03:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:31,532 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3010 transitions. [2021-06-05 22:03:31,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:31,532 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3010 transitions. [2021-06-05 22:03:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:31,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:31,533 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:31,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:31,734 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash 738958384, now seen corresponding path program 201 times [2021-06-05 22:03:31,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:31,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140137805] [2021-06-05 22:03:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:31,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140137805] [2021-06-05 22:03:31,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140137805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555144087] [2021-06-05 22:03:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:31,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:31,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:31,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555144087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:31,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:03:31,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100534555] [2021-06-05 22:03:31,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:03:31,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:31,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:03:31,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:03:31,893 INFO L87 Difference]: Start difference. First operand 887 states and 3010 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:32,119 INFO L93 Difference]: Finished difference Result 1159 states and 3711 transitions. [2021-06-05 22:03:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:32,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:32,120 INFO L225 Difference]: With dead ends: 1159 [2021-06-05 22:03:32,120 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 22:03:32,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:03:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 22:03:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 871. [2021-06-05 22:03:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-05 22:03:32,131 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-05 22:03:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:32,131 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-05 22:03:32,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-05 22:03:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:32,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:32,132 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:32,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-05 22:03:32,332 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:32,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1803358238, now seen corresponding path program 202 times [2021-06-05 22:03:32,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:32,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143974000] [2021-06-05 22:03:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:32,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143974000] [2021-06-05 22:03:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143974000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127563726] [2021-06-05 22:03:32,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:32,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:32,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:32,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:32,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127563726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:32,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:32,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:03:32,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104426901] [2021-06-05 22:03:32,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:03:32,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:32,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:03:32,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:03:32,512 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:32,839 INFO L93 Difference]: Finished difference Result 1282 states and 4043 transitions. [2021-06-05 22:03:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:32,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:32,841 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 22:03:32,841 INFO L226 Difference]: Without dead ends: 1282 [2021-06-05 22:03:32,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:03:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-05 22:03:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 871. [2021-06-05 22:03:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-05 22:03:32,851 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-05 22:03:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:32,851 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-05 22:03:32,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-05 22:03:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:32,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:32,852 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:33,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:33,052 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash 672713702, now seen corresponding path program 203 times [2021-06-05 22:03:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:33,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983040634] [2021-06-05 22:03:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:33,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:33,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983040634] [2021-06-05 22:03:33,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983040634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:33,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269386168] [2021-06-05 22:03:33,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:33,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:33,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:33,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:33,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269386168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:33,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:33,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:33,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212871088] [2021-06-05 22:03:33,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:33,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:33,296 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:33,695 INFO L93 Difference]: Finished difference Result 1117 states and 3611 transitions. [2021-06-05 22:03:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:33,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:33,697 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 22:03:33,697 INFO L226 Difference]: Without dead ends: 1103 [2021-06-05 22:03:33,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-05 22:03:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 871. [2021-06-05 22:03:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-05 22:03:33,707 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-05 22:03:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:33,707 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-05 22:03:33,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-05 22:03:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:33,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:33,708 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:33,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:33,908 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -245147176, now seen corresponding path program 204 times [2021-06-05 22:03:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:33,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420999738] [2021-06-05 22:03:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:33,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:33,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420999738] [2021-06-05 22:03:33,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420999738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:33,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568312932] [2021-06-05 22:03:33,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:34,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:34,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:34,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:34,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568312932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:34,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:34,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:34,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996209502] [2021-06-05 22:03:34,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:34,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:34,110 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:34,563 INFO L93 Difference]: Finished difference Result 1319 states and 4131 transitions. [2021-06-05 22:03:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:03:34,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:34,565 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 22:03:34,565 INFO L226 Difference]: Without dead ends: 1319 [2021-06-05 22:03:34,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-06-05 22:03:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 874. [2021-06-05 22:03:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.3986254295532645) internal successors, (2967), 873 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2967 transitions. [2021-06-05 22:03:34,575 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2967 transitions. Word has length 20 [2021-06-05 22:03:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:34,575 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2967 transitions. [2021-06-05 22:03:34,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2967 transitions. [2021-06-05 22:03:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:34,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:34,577 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:34,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-06-05 22:03:34,777 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1031201196, now seen corresponding path program 205 times [2021-06-05 22:03:34,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:34,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320577101] [2021-06-05 22:03:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:34,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320577101] [2021-06-05 22:03:34,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320577101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015397368] [2021-06-05 22:03:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:35,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015397368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:35,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:35,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:35,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129557193] [2021-06-05 22:03:35,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:35,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:35,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:35,013 INFO L87 Difference]: Start difference. First operand 874 states and 2967 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:35,480 INFO L93 Difference]: Finished difference Result 1152 states and 3694 transitions. [2021-06-05 22:03:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:35,482 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 22:03:35,482 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 22:03:35,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 481.4ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 22:03:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 887. [2021-06-05 22:03:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.393905191873589) internal successors, (3007), 886 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3007 transitions. [2021-06-05 22:03:35,493 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3007 transitions. Word has length 20 [2021-06-05 22:03:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:35,493 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3007 transitions. [2021-06-05 22:03:35,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3007 transitions. [2021-06-05 22:03:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:35,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:35,494 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:35,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-06-05 22:03:35,694 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash 463211042, now seen corresponding path program 206 times [2021-06-05 22:03:35,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:35,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342197560] [2021-06-05 22:03:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:35,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:35,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342197560] [2021-06-05 22:03:35,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342197560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:35,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398666589] [2021-06-05 22:03:35,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:35,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:35,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:35,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:35,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:35,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398666589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:35,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:35,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:35,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450786565] [2021-06-05 22:03:35,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:35,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:35,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:35,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:35,897 INFO L87 Difference]: Start difference. First operand 887 states and 3007 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:36,695 INFO L93 Difference]: Finished difference Result 1414 states and 4369 transitions. [2021-06-05 22:03:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:03:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:36,697 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 22:03:36,697 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 22:03:36,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 22:03:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 887. [2021-06-05 22:03:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.393905191873589) internal successors, (3007), 886 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3007 transitions. [2021-06-05 22:03:36,709 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3007 transitions. Word has length 20 [2021-06-05 22:03:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:36,709 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3007 transitions. [2021-06-05 22:03:36,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3007 transitions. [2021-06-05 22:03:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:36,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:36,710 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:36,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-06-05 22:03:36,910 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1030696680, now seen corresponding path program 207 times [2021-06-05 22:03:36,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:36,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058196196] [2021-06-05 22:03:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:36,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:36,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058196196] [2021-06-05 22:03:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058196196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:36,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500064011] [2021-06-05 22:03:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:37,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:37,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:37,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:37,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:37,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500064011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:37,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:37,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:37,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005729195] [2021-06-05 22:03:37,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:37,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:37,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:37,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:37,133 INFO L87 Difference]: Start difference. First operand 887 states and 3007 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:37,536 INFO L93 Difference]: Finished difference Result 1308 states and 4100 transitions. [2021-06-05 22:03:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:03:37,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:37,537 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 22:03:37,537 INFO L226 Difference]: Without dead ends: 1302 [2021-06-05 22:03:37,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-06-05 22:03:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 887. [2021-06-05 22:03:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.3905191873589167) internal successors, (3004), 886 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3004 transitions. [2021-06-05 22:03:37,548 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3004 transitions. Word has length 20 [2021-06-05 22:03:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:37,548 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3004 transitions. [2021-06-05 22:03:37,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3004 transitions. [2021-06-05 22:03:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:37,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:37,549 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:37,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:37,750 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:37,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1823327782, now seen corresponding path program 208 times [2021-06-05 22:03:37,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:37,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214162262] [2021-06-05 22:03:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:37,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:37,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214162262] [2021-06-05 22:03:37,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214162262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:37,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837260483] [2021-06-05 22:03:37,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:37,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:37,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:37,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837260483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:37,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:37,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:37,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738746497] [2021-06-05 22:03:37,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:37,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:37,996 INFO L87 Difference]: Start difference. First operand 887 states and 3004 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:38,332 INFO L93 Difference]: Finished difference Result 1115 states and 3617 transitions. [2021-06-05 22:03:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:38,333 INFO L225 Difference]: With dead ends: 1115 [2021-06-05 22:03:38,333 INFO L226 Difference]: Without dead ends: 1115 [2021-06-05 22:03:38,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 361.4ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-05 22:03:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 866. [2021-06-05 22:03:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.4057803468208094) internal successors, (2946), 865 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2946 transitions. [2021-06-05 22:03:38,343 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2946 transitions. Word has length 20 [2021-06-05 22:03:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:38,343 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2946 transitions. [2021-06-05 22:03:38,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2946 transitions. [2021-06-05 22:03:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:38,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:38,344 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:38,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3339 [2021-06-05 22:03:38,545 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash 229814562, now seen corresponding path program 209 times [2021-06-05 22:03:38,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:38,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068495302] [2021-06-05 22:03:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:38,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068495302] [2021-06-05 22:03:38,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068495302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74181882] [2021-06-05 22:03:38,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:38,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:38,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:38,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:38,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:38,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74181882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:38,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:38,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837479656] [2021-06-05 22:03:38,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:38,788 INFO L87 Difference]: Start difference. First operand 866 states and 2946 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:39,114 INFO L93 Difference]: Finished difference Result 1035 states and 3386 transitions. [2021-06-05 22:03:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:39,115 INFO L225 Difference]: With dead ends: 1035 [2021-06-05 22:03:39,115 INFO L226 Difference]: Without dead ends: 1021 [2021-06-05 22:03:39,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-05 22:03:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 863. [2021-06-05 22:03:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4048723897911835) internal successors, (2935), 862 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2935 transitions. [2021-06-05 22:03:39,139 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2935 transitions. Word has length 20 [2021-06-05 22:03:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:39,139 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2935 transitions. [2021-06-05 22:03:39,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2935 transitions. [2021-06-05 22:03:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:39,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:39,140 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:39,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:39,349 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash -688046316, now seen corresponding path program 210 times [2021-06-05 22:03:39,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:39,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306372784] [2021-06-05 22:03:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:39,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306372784] [2021-06-05 22:03:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306372784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540398116] [2021-06-05 22:03:39,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:39,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:39,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540398116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:39,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:39,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:39,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239850067] [2021-06-05 22:03:39,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:39,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:39,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:39,580 INFO L87 Difference]: Start difference. First operand 863 states and 2935 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:39,923 INFO L93 Difference]: Finished difference Result 1127 states and 3620 transitions. [2021-06-05 22:03:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:39,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:39,925 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 22:03:39,925 INFO L226 Difference]: Without dead ends: 1127 [2021-06-05 22:03:39,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:03:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-05 22:03:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 866. [2021-06-05 22:03:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.4023121387283237) internal successors, (2943), 865 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2943 transitions. [2021-06-05 22:03:39,936 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2943 transitions. Word has length 20 [2021-06-05 22:03:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:39,936 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2943 transitions. [2021-06-05 22:03:39,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2943 transitions. [2021-06-05 22:03:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:39,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:39,937 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:40,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-06-05 22:03:40,153 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:40,153 INFO L82 PathProgramCache]: Analyzing trace with hash 20311902, now seen corresponding path program 211 times [2021-06-05 22:03:40,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:40,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810474025] [2021-06-05 22:03:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:40,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810474025] [2021-06-05 22:03:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810474025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418840207] [2021-06-05 22:03:40,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:40,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:40,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418840207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:40,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:40,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:40,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336580651] [2021-06-05 22:03:40,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:40,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:40,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:40,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:40,388 INFO L87 Difference]: Start difference. First operand 866 states and 2943 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:40,829 INFO L93 Difference]: Finished difference Result 1165 states and 3732 transitions. [2021-06-05 22:03:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:03:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:40,831 INFO L225 Difference]: With dead ends: 1165 [2021-06-05 22:03:40,831 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 22:03:40,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 22:03:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 863. [2021-06-05 22:03:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4048723897911835) internal successors, (2935), 862 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2935 transitions. [2021-06-05 22:03:40,841 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2935 transitions. Word has length 20 [2021-06-05 22:03:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:40,841 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2935 transitions. [2021-06-05 22:03:40,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2935 transitions. [2021-06-05 22:03:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:40,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:40,842 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:41,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-06-05 22:03:41,059 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:41,059 INFO L82 PathProgramCache]: Analyzing trace with hash 714082840, now seen corresponding path program 212 times [2021-06-05 22:03:41,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:41,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840853490] [2021-06-05 22:03:41,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:41,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:41,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840853490] [2021-06-05 22:03:41,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840853490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:41,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194643655] [2021-06-05 22:03:41,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:41,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:41,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194643655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:41,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:41,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:41,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13132102] [2021-06-05 22:03:41,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:41,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:41,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:41,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:41,279 INFO L87 Difference]: Start difference. First operand 863 states and 2935 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:41,532 INFO L93 Difference]: Finished difference Result 1085 states and 3509 transitions. [2021-06-05 22:03:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:41,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:41,534 INFO L225 Difference]: With dead ends: 1085 [2021-06-05 22:03:41,534 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 22:03:41,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 22:03:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 882. [2021-06-05 22:03:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.401816118047673) internal successors, (2997), 881 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2997 transitions. [2021-06-05 22:03:41,544 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2997 transitions. Word has length 20 [2021-06-05 22:03:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:41,544 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2997 transitions. [2021-06-05 22:03:41,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2997 transitions. [2021-06-05 22:03:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:41,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:41,545 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:41,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:41,761 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1519520138, now seen corresponding path program 213 times [2021-06-05 22:03:41,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:41,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882743934] [2021-06-05 22:03:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:41,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:41,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882743934] [2021-06-05 22:03:41,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882743934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:41,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289777473] [2021-06-05 22:03:41,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:41,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:03:41,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:41,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:42,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289777473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:42,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:42,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:42,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072865956] [2021-06-05 22:03:42,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:42,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:42,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:42,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:42,007 INFO L87 Difference]: Start difference. First operand 882 states and 2997 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:42,331 INFO L93 Difference]: Finished difference Result 1168 states and 3719 transitions. [2021-06-05 22:03:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:42,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:42,333 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 22:03:42,333 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 22:03:42,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:03:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 22:03:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 882. [2021-06-05 22:03:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.401816118047673) internal successors, (2997), 881 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2997 transitions. [2021-06-05 22:03:42,343 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2997 transitions. Word has length 20 [2021-06-05 22:03:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:42,343 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2997 transitions. [2021-06-05 22:03:42,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2997 transitions. [2021-06-05 22:03:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:42,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:42,344 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:42,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-06-05 22:03:42,545 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 714587356, now seen corresponding path program 214 times [2021-06-05 22:03:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:42,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185128086] [2021-06-05 22:03:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:42,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:42,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185128086] [2021-06-05 22:03:42,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185128086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:42,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108446520] [2021-06-05 22:03:42,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:42,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:42,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:42,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:42,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:42,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108446520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:42,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:42,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:42,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586432289] [2021-06-05 22:03:42,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:42,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:42,773 INFO L87 Difference]: Start difference. First operand 882 states and 2997 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:43,157 INFO L93 Difference]: Finished difference Result 1181 states and 3743 transitions. [2021-06-05 22:03:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:03:43,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:43,158 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 22:03:43,158 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 22:03:43,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 22:03:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 882. [2021-06-05 22:03:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.398410896708286) internal successors, (2994), 881 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2994 transitions. [2021-06-05 22:03:43,174 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2994 transitions. Word has length 20 [2021-06-05 22:03:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:43,174 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2994 transitions. [2021-06-05 22:03:43,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2994 transitions. [2021-06-05 22:03:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:43,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:43,175 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:43,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:43,375 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash -726355478, now seen corresponding path program 215 times [2021-06-05 22:03:43,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:43,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966039841] [2021-06-05 22:03:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:43,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:43,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966039841] [2021-06-05 22:03:43,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966039841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:43,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173060180] [2021-06-05 22:03:43,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:43,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:03:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:43,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:43,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173060180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:43,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:43,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:43,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727688087] [2021-06-05 22:03:43,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:43,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:43,589 INFO L87 Difference]: Start difference. First operand 882 states and 2994 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:43,879 INFO L93 Difference]: Finished difference Result 1087 states and 3519 transitions. [2021-06-05 22:03:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:43,881 INFO L225 Difference]: With dead ends: 1087 [2021-06-05 22:03:43,881 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 22:03:43,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:03:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 22:03:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 879. [2021-06-05 22:03:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.4009111617312073) internal successors, (2986), 878 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2986 transitions. [2021-06-05 22:03:43,891 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2986 transitions. Word has length 20 [2021-06-05 22:03:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:43,891 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2986 transitions. [2021-06-05 22:03:43,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2986 transitions. [2021-06-05 22:03:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:43,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:43,892 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:44,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-06-05 22:03:44,102 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:44,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1252442934, now seen corresponding path program 216 times [2021-06-05 22:03:44,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:44,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774889109] [2021-06-05 22:03:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:44,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:44,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774889109] [2021-06-05 22:03:44,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774889109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216164958] [2021-06-05 22:03:44,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:44,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:44,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:44,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:44,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:44,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216164958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:44,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:44,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186921294] [2021-06-05 22:03:44,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:44,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:44,327 INFO L87 Difference]: Start difference. First operand 879 states and 2986 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:44,656 INFO L93 Difference]: Finished difference Result 1124 states and 3611 transitions. [2021-06-05 22:03:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:44,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:44,658 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 22:03:44,658 INFO L226 Difference]: Without dead ends: 1112 [2021-06-05 22:03:44,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:03:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-05 22:03:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 879. [2021-06-05 22:03:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.39749430523918) internal successors, (2983), 878 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2983 transitions. [2021-06-05 22:03:44,668 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2983 transitions. Word has length 20 [2021-06-05 22:03:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:44,668 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2983 transitions. [2021-06-05 22:03:44,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2983 transitions. [2021-06-05 22:03:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:44,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:44,669 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:44,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:44,881 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1422441058, now seen corresponding path program 217 times [2021-06-05 22:03:44,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:44,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46236158] [2021-06-05 22:03:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:44,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:44,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46236158] [2021-06-05 22:03:44,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46236158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472761290] [2021-06-05 22:03:44,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:45,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472761290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:45,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:45,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:45,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967231409] [2021-06-05 22:03:45,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:45,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:45,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:45,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:45,126 INFO L87 Difference]: Start difference. First operand 879 states and 2983 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:45,382 INFO L93 Difference]: Finished difference Result 1048 states and 3432 transitions. [2021-06-05 22:03:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:45,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:45,390 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 22:03:45,390 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 22:03:45,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 22:03:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 860. [2021-06-05 22:03:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4074505238649593) internal successors, (2927), 859 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2927 transitions. [2021-06-05 22:03:45,407 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2927 transitions. Word has length 20 [2021-06-05 22:03:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:45,407 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2927 transitions. [2021-06-05 22:03:45,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2927 transitions. [2021-06-05 22:03:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:45,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:45,408 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:45,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:45,625 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2092510764, now seen corresponding path program 218 times [2021-06-05 22:03:45,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:45,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954213887] [2021-06-05 22:03:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:45,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:45,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954213887] [2021-06-05 22:03:45,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954213887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:45,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905572776] [2021-06-05 22:03:45,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:45,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:45,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:45,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:45,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905572776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:45,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:45,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:03:45,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139354219] [2021-06-05 22:03:45,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:03:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:03:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:03:45,852 INFO L87 Difference]: Start difference. First operand 860 states and 2927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:46,212 INFO L93 Difference]: Finished difference Result 1395 states and 4367 transitions. [2021-06-05 22:03:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:46,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:46,214 INFO L225 Difference]: With dead ends: 1395 [2021-06-05 22:03:46,214 INFO L226 Difference]: Without dead ends: 1395 [2021-06-05 22:03:46,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-05 22:03:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 872. [2021-06-05 22:03:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.407577497129736) internal successors, (2968), 871 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2968 transitions. [2021-06-05 22:03:46,225 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2968 transitions. Word has length 20 [2021-06-05 22:03:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:46,225 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2968 transitions. [2021-06-05 22:03:46,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2968 transitions. [2021-06-05 22:03:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:46,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:46,226 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:46,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3382 [2021-06-05 22:03:46,427 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:46,427 INFO L82 PathProgramCache]: Analyzing trace with hash -644245470, now seen corresponding path program 219 times [2021-06-05 22:03:46,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:46,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696151241] [2021-06-05 22:03:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:46,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696151241] [2021-06-05 22:03:46,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696151241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27546888] [2021-06-05 22:03:46,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:46,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:46,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27546888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:46,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:46,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410795784] [2021-06-05 22:03:46,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:46,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:46,673 INFO L87 Difference]: Start difference. First operand 872 states and 2968 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:47,177 INFO L93 Difference]: Finished difference Result 1447 states and 4500 transitions. [2021-06-05 22:03:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:03:47,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:47,179 INFO L225 Difference]: With dead ends: 1447 [2021-06-05 22:03:47,179 INFO L226 Difference]: Without dead ends: 1447 [2021-06-05 22:03:47,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 487.0ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-06-05 22:03:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 878. [2021-06-05 22:03:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.4059293044469783) internal successors, (2987), 877 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2987 transitions. [2021-06-05 22:03:47,190 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2987 transitions. Word has length 20 [2021-06-05 22:03:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:47,190 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2987 transitions. [2021-06-05 22:03:47,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2987 transitions. [2021-06-05 22:03:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:47,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:47,192 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:47,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-06-05 22:03:47,392 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:47,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1430299490, now seen corresponding path program 220 times [2021-06-05 22:03:47,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:47,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549426828] [2021-06-05 22:03:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:47,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:47,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549426828] [2021-06-05 22:03:47,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549426828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:47,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905219513] [2021-06-05 22:03:47,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:47,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:47,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:47,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:47,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905219513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:47,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:47,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:03:47,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892349800] [2021-06-05 22:03:47,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:03:47,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:03:47,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:47,695 INFO L87 Difference]: Start difference. First operand 878 states and 2987 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:48,365 INFO L93 Difference]: Finished difference Result 1298 states and 4097 transitions. [2021-06-05 22:03:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:03:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:48,376 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 22:03:48,376 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 22:03:48,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 666.9ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 22:03:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 891. [2021-06-05 22:03:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.401123595505618) internal successors, (3027), 890 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3027 transitions. [2021-06-05 22:03:48,387 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3027 transitions. Word has length 20 [2021-06-05 22:03:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:48,387 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3027 transitions. [2021-06-05 22:03:48,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3027 transitions. [2021-06-05 22:03:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:48,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:48,388 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:48,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-05 22:03:48,589 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash 64112748, now seen corresponding path program 221 times [2021-06-05 22:03:48,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:48,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414420067] [2021-06-05 22:03:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:48,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:48,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414420067] [2021-06-05 22:03:48,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414420067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:48,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939357078] [2021-06-05 22:03:48,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:48,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:48,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:48,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939357078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:48,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:48,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:48,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100747715] [2021-06-05 22:03:48,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:48,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:48,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:48,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:48,848 INFO L87 Difference]: Start difference. First operand 891 states and 3027 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:49,722 INFO L93 Difference]: Finished difference Result 1575 states and 4819 transitions. [2021-06-05 22:03:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:03:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:49,724 INFO L225 Difference]: With dead ends: 1575 [2021-06-05 22:03:49,724 INFO L226 Difference]: Without dead ends: 1575 [2021-06-05 22:03:49,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 827.7ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-06-05 22:03:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 894. [2021-06-05 22:03:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.4053751399776035) internal successors, (3041), 893 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3041 transitions. [2021-06-05 22:03:49,735 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3041 transitions. Word has length 20 [2021-06-05 22:03:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:49,735 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3041 transitions. [2021-06-05 22:03:49,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3041 transitions. [2021-06-05 22:03:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:49,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:49,736 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:49,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:49,937 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1429794974, now seen corresponding path program 222 times [2021-06-05 22:03:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:49,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091190858] [2021-06-05 22:03:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:49,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:49,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091190858] [2021-06-05 22:03:49,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091190858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:49,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923603796] [2021-06-05 22:03:49,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:50,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:03:50,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:50,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923603796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:50,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:50,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:50,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129796699] [2021-06-05 22:03:50,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:50,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:50,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:50,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:50,193 INFO L87 Difference]: Start difference. First operand 894 states and 3041 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:50,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:50,661 INFO L93 Difference]: Finished difference Result 1469 states and 4544 transitions. [2021-06-05 22:03:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:03:50,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:50,663 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 22:03:50,663 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 22:03:50,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:03:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 22:03:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 900. [2021-06-05 22:03:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.3937708565072304) internal successors, (3051), 899 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3051 transitions. [2021-06-05 22:03:50,676 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3051 transitions. Word has length 20 [2021-06-05 22:03:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:50,676 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3051 transitions. [2021-06-05 22:03:50,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3051 transitions. [2021-06-05 22:03:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:50,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:50,678 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:50,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3408 [2021-06-05 22:03:50,878 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:50,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1424229488, now seen corresponding path program 223 times [2021-06-05 22:03:50,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:50,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890478586] [2021-06-05 22:03:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:50,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:50,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890478586] [2021-06-05 22:03:50,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890478586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:50,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573135615] [2021-06-05 22:03:50,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:51,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:51,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:51,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573135615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:51,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:51,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:03:51,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795798328] [2021-06-05 22:03:51,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:03:51,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:51,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:03:51,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:51,202 INFO L87 Difference]: Start difference. First operand 900 states and 3051 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:51,397 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-06-05 22:03:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:51,731 INFO L93 Difference]: Finished difference Result 1270 states and 4047 transitions. [2021-06-05 22:03:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:51,733 INFO L225 Difference]: With dead ends: 1270 [2021-06-05 22:03:51,733 INFO L226 Difference]: Without dead ends: 1270 [2021-06-05 22:03:51,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:03:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-06-05 22:03:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 879. [2021-06-05 22:03:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.408883826879271) internal successors, (2993), 878 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2993 transitions. [2021-06-05 22:03:51,744 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2993 transitions. Word has length 20 [2021-06-05 22:03:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:51,744 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2993 transitions. [2021-06-05 22:03:51,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2993 transitions. [2021-06-05 22:03:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:51,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:51,745 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:51,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3416 [2021-06-05 22:03:51,945 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1979263942, now seen corresponding path program 224 times [2021-06-05 22:03:51,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:51,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490307659] [2021-06-05 22:03:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:51,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:51,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490307659] [2021-06-05 22:03:51,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490307659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:51,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333025261] [2021-06-05 22:03:51,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:52,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:52,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:52,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:52,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333025261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:52,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:52,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:52,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650633651] [2021-06-05 22:03:52,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:52,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:52,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:52,205 INFO L87 Difference]: Start difference. First operand 879 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:52,722 INFO L93 Difference]: Finished difference Result 1202 states and 3860 transitions. [2021-06-05 22:03:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:03:52,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:52,724 INFO L225 Difference]: With dead ends: 1202 [2021-06-05 22:03:52,724 INFO L226 Difference]: Without dead ends: 1177 [2021-06-05 22:03:52,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 526.8ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:03:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-05 22:03:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 883. [2021-06-05 22:03:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 3.4047619047619047) internal successors, (3003), 882 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 3003 transitions. [2021-06-05 22:03:52,734 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 3003 transitions. Word has length 20 [2021-06-05 22:03:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:52,734 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 3003 transitions. [2021-06-05 22:03:52,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 3003 transitions. [2021-06-05 22:03:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:52,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:52,735 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:52,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-05 22:03:52,935 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1661141342, now seen corresponding path program 225 times [2021-06-05 22:03:52,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:52,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58481399] [2021-06-05 22:03:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:52,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58481399] [2021-06-05 22:03:52,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58481399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:52,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829808641] [2021-06-05 22:03:52,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:53,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:53,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:53,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:53,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829808641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:53,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:53,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:03:53,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533125245] [2021-06-05 22:03:53,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:03:53,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:53,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:03:53,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:03:53,157 INFO L87 Difference]: Start difference. First operand 883 states and 3003 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:53,502 INFO L93 Difference]: Finished difference Result 1332 states and 4235 transitions. [2021-06-05 22:03:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:53,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:53,504 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 22:03:53,504 INFO L226 Difference]: Without dead ends: 1332 [2021-06-05 22:03:53,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:03:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-05 22:03:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 870. [2021-06-05 22:03:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4073647871116224) internal successors, (2961), 869 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2961 transitions. [2021-06-05 22:03:53,515 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2961 transitions. Word has length 20 [2021-06-05 22:03:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:53,515 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2961 transitions. [2021-06-05 22:03:53,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2961 transitions. [2021-06-05 22:03:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:53,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:53,516 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:53,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3434,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:53,716 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1718811554, now seen corresponding path program 226 times [2021-06-05 22:03:53,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:53,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65203116] [2021-06-05 22:03:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:53,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:53,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65203116] [2021-06-05 22:03:53,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65203116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:53,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604643335] [2021-06-05 22:03:53,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:53,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:53,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:53,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:53,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604643335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:53,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:53,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:03:53,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619731025] [2021-06-05 22:03:53,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:03:53,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:03:53,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:53,957 INFO L87 Difference]: Start difference. First operand 870 states and 2961 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:54,343 INFO L93 Difference]: Finished difference Result 1256 states and 4050 transitions. [2021-06-05 22:03:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:54,345 INFO L225 Difference]: With dead ends: 1256 [2021-06-05 22:03:54,345 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 22:03:54,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 22:03:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 873. [2021-06-05 22:03:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-05 22:03:54,355 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-05 22:03:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:54,356 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-05 22:03:54,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-05 22:03:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:54,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:54,357 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:54,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3438,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:54,557 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:54,557 INFO L82 PathProgramCache]: Analyzing trace with hash 951965406, now seen corresponding path program 227 times [2021-06-05 22:03:54,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:54,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233437647] [2021-06-05 22:03:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:54,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:54,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233437647] [2021-06-05 22:03:54,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233437647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:54,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323719229] [2021-06-05 22:03:54,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:54,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:54,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:54,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:54,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323719229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:54,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:54,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:03:54,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634063800] [2021-06-05 22:03:54,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:03:54,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:03:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:54,805 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:55,200 INFO L93 Difference]: Finished difference Result 1288 states and 4131 transitions. [2021-06-05 22:03:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:55,202 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 22:03:55,202 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 22:03:55,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 22:03:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 874. [2021-06-05 22:03:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-05 22:03:55,214 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-05 22:03:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:55,214 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-05 22:03:55,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-05 22:03:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:55,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:55,215 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:55,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:55,415 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:55,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1005171550, now seen corresponding path program 228 times [2021-06-05 22:03:55,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:55,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209487984] [2021-06-05 22:03:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:55,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:55,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209487984] [2021-06-05 22:03:55,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209487984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24592234] [2021-06-05 22:03:55,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:55,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:03:55,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:55,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:55,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:55,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24592234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:55,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:03:55,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736790406] [2021-06-05 22:03:55,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:03:55,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:55,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:03:55,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:03:55,689 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:56,066 INFO L93 Difference]: Finished difference Result 1255 states and 4054 transitions. [2021-06-05 22:03:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:03:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:56,068 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 22:03:56,068 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 22:03:56,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 22:03:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 873. [2021-06-05 22:03:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-05 22:03:56,078 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-05 22:03:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:56,078 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-05 22:03:56,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-05 22:03:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:56,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:56,079 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:56,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-06-05 22:03:56,281 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1815112108, now seen corresponding path program 229 times [2021-06-05 22:03:56,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:56,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628632919] [2021-06-05 22:03:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:56,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628632919] [2021-06-05 22:03:56,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628632919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:56,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239487859] [2021-06-05 22:03:56,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:56,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:56,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239487859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:56,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:56,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:03:56,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225413793] [2021-06-05 22:03:56,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:03:56,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:56,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:03:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:56,527 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:57,039 INFO L93 Difference]: Finished difference Result 1327 states and 4214 transitions. [2021-06-05 22:03:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:03:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:57,040 INFO L225 Difference]: With dead ends: 1327 [2021-06-05 22:03:57,040 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 22:03:57,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 22:03:57,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 880. [2021-06-05 22:03:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-05 22:03:57,051 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-05 22:03:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:57,051 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-05 22:03:57,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-05 22:03:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:57,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:57,052 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:57,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:57,253 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:57,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:57,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1693801168, now seen corresponding path program 230 times [2021-06-05 22:03:57,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:57,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728597633] [2021-06-05 22:03:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:57,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:57,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728597633] [2021-06-05 22:03:57,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728597633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:57,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142517906] [2021-06-05 22:03:57,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:57,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:57,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:57,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:57,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:57,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142517906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:57,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:57,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:03:57,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547760376] [2021-06-05 22:03:57,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:03:57,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:03:57,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:57,551 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:58,447 INFO L93 Difference]: Finished difference Result 1319 states and 4148 transitions. [2021-06-05 22:03:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:03:58,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:58,449 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 22:03:58,449 INFO L226 Difference]: Without dead ends: 1312 [2021-06-05 22:03:58,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 884.0ms TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:03:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-06-05 22:03:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 893. [2021-06-05 22:03:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4091928251121075) internal successors, (3041), 892 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3041 transitions. [2021-06-05 22:03:58,460 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3041 transitions. Word has length 20 [2021-06-05 22:03:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:58,460 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3041 transitions. [2021-06-05 22:03:58,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3041 transitions. [2021-06-05 22:03:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:58,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:58,461 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:58,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-06-05 22:03:58,661 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1106753890, now seen corresponding path program 231 times [2021-06-05 22:03:58,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:58,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923677370] [2021-06-05 22:03:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:58,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:58,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923677370] [2021-06-05 22:03:58,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923677370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:58,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025262893] [2021-06-05 22:03:58,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:58,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:03:58,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:03:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:58,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025262893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:58,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:58,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:03:58,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704856775] [2021-06-05 22:03:58,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:03:58,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:58,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:03:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:03:58,926 INFO L87 Difference]: Start difference. First operand 893 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:59,854 INFO L93 Difference]: Finished difference Result 1513 states and 4641 transitions. [2021-06-05 22:03:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:03:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:59,856 INFO L225 Difference]: With dead ends: 1513 [2021-06-05 22:03:59,856 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 22:03:59,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 862.2ms TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:03:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 22:03:59,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 896. [2021-06-05 22:03:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.4134078212290504) internal successors, (3055), 895 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3055 transitions. [2021-06-05 22:03:59,868 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3055 transitions. Word has length 20 [2021-06-05 22:03:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:59,868 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 3055 transitions. [2021-06-05 22:03:59,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3055 transitions. [2021-06-05 22:03:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:59,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:59,869 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:00,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3473 [2021-06-05 22:04:00,070 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:00,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1694305684, now seen corresponding path program 232 times [2021-06-05 22:04:00,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:00,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195367062] [2021-06-05 22:04:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:00,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:00,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195367062] [2021-06-05 22:04:00,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195367062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:00,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735537117] [2021-06-05 22:04:00,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:00,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:00,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:00,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735537117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:00,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:00,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:00,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737285868] [2021-06-05 22:04:00,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:00,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:00,325 INFO L87 Difference]: Start difference. First operand 896 states and 3055 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:00,808 INFO L93 Difference]: Finished difference Result 1391 states and 4357 transitions. [2021-06-05 22:04:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:04:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:00,809 INFO L225 Difference]: With dead ends: 1391 [2021-06-05 22:04:00,809 INFO L226 Difference]: Without dead ends: 1385 [2021-06-05 22:04:00,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-05 22:04:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 902. [2021-06-05 22:04:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4017758046614874) internal successors, (3065), 901 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3065 transitions. [2021-06-05 22:04:00,820 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3065 transitions. Word has length 20 [2021-06-05 22:04:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:00,820 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3065 transitions. [2021-06-05 22:04:00,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3065 transitions. [2021-06-05 22:04:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:00,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:00,822 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:01,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:01,022 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:01,022 INFO L82 PathProgramCache]: Analyzing trace with hash 253362850, now seen corresponding path program 233 times [2021-06-05 22:04:01,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:01,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822888744] [2021-06-05 22:04:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:01,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:01,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822888744] [2021-06-05 22:04:01,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822888744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:01,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076016850] [2021-06-05 22:04:01,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:01,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:01,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:01,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:01,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076016850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:01,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:01,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:01,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857851423] [2021-06-05 22:04:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:01,314 INFO L87 Difference]: Start difference. First operand 902 states and 3065 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:01,921 INFO L93 Difference]: Finished difference Result 1244 states and 3987 transitions. [2021-06-05 22:04:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:01,923 INFO L225 Difference]: With dead ends: 1244 [2021-06-05 22:04:01,923 INFO L226 Difference]: Without dead ends: 1244 [2021-06-05 22:04:01,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 610.0ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-05 22:04:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 886. [2021-06-05 22:04:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-05 22:04:01,933 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-05 22:04:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:01,933 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-05 22:04:01,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-05 22:04:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:01,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:01,934 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:02,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-06-05 22:04:02,135 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1018215370, now seen corresponding path program 234 times [2021-06-05 22:04:02,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:02,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829181813] [2021-06-05 22:04:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:02,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:02,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829181813] [2021-06-05 22:04:02,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829181813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:02,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391560492] [2021-06-05 22:04:02,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:02,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:02,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:02,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391560492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:02,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:02,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:02,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363599269] [2021-06-05 22:04:02,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:02,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:02,427 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:03,218 INFO L93 Difference]: Finished difference Result 1215 states and 3915 transitions. [2021-06-05 22:04:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:03,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:03,220 INFO L225 Difference]: With dead ends: 1215 [2021-06-05 22:04:03,220 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 22:04:03,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 22:04:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 886. [2021-06-05 22:04:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-05 22:04:03,230 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-05 22:04:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:03,230 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-05 22:04:03,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-05 22:04:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:03,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:03,231 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:03,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:03,432 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:03,432 INFO L82 PathProgramCache]: Analyzing trace with hash 641912734, now seen corresponding path program 235 times [2021-06-05 22:04:03,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:03,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037232264] [2021-06-05 22:04:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:03,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:03,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037232264] [2021-06-05 22:04:03,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037232264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:03,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956102712] [2021-06-05 22:04:03,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:03,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:03,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:03,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956102712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:03,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:03,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:03,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917017849] [2021-06-05 22:04:03,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:03,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:03,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:03,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:03,813 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:04,477 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-05 22:04:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:04,678 INFO L93 Difference]: Finished difference Result 1168 states and 3814 transitions. [2021-06-05 22:04:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:04:04,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:04,679 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 22:04:04,679 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 22:04:04,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 885.8ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 22:04:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 886. [2021-06-05 22:04:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-05 22:04:04,689 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-05 22:04:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:04,689 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-05 22:04:04,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-05 22:04:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:04,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:04,690 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:04,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3507 [2021-06-05 22:04:04,891 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash 3464990, now seen corresponding path program 236 times [2021-06-05 22:04:04,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:04,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436164815] [2021-06-05 22:04:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:04,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:04,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436164815] [2021-06-05 22:04:04,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436164815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:04,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419645804] [2021-06-05 22:04:04,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:05,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:05,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:05,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:05,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:05,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419645804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:05,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:05,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:05,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199148136] [2021-06-05 22:04:05,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:05,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:05,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:05,157 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:05,643 INFO L93 Difference]: Finished difference Result 1230 states and 3981 transitions. [2021-06-05 22:04:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:04:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:05,645 INFO L225 Difference]: With dead ends: 1230 [2021-06-05 22:04:05,645 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 22:04:05,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 22:04:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 876. [2021-06-05 22:04:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.418285714285714) internal successors, (2991), 875 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2991 transitions. [2021-06-05 22:04:05,655 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2991 transitions. Word has length 20 [2021-06-05 22:04:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:05,655 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2991 transitions. [2021-06-05 22:04:05,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2991 transitions. [2021-06-05 22:04:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:05,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:05,656 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:05,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3517,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:05,857 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:05,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:05,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231070, now seen corresponding path program 237 times [2021-06-05 22:04:05,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:05,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719152999] [2021-06-05 22:04:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:05,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:05,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719152999] [2021-06-05 22:04:05,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719152999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:05,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383960388] [2021-06-05 22:04:05,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:05,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:05,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:05,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:05,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:06,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383960388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:06,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:06,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:06,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650462815] [2021-06-05 22:04:06,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:06,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:06,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:06,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:06,124 INFO L87 Difference]: Start difference. First operand 876 states and 2991 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:06,715 INFO L93 Difference]: Finished difference Result 1261 states and 4066 transitions. [2021-06-05 22:04:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:04:06,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:06,717 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 22:04:06,717 INFO L226 Difference]: Without dead ends: 1261 [2021-06-05 22:04:06,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 561.3ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-05 22:04:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 877. [2021-06-05 22:04:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.421232876712329) internal successors, (2997), 876 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2997 transitions. [2021-06-05 22:04:06,728 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2997 transitions. Word has length 20 [2021-06-05 22:04:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:06,728 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2997 transitions. [2021-06-05 22:04:06,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2997 transitions. [2021-06-05 22:04:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:06,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:06,729 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:06,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3523 [2021-06-05 22:04:06,930 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash -770905886, now seen corresponding path program 238 times [2021-06-05 22:04:06,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:06,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635307200] [2021-06-05 22:04:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:07,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:07,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635307200] [2021-06-05 22:04:07,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635307200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:07,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4851813] [2021-06-05 22:04:07,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:07,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:07,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:07,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4851813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:07,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:07,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:07,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045966798] [2021-06-05 22:04:07,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:07,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:07,212 INFO L87 Difference]: Start difference. First operand 877 states and 2997 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:07,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:07,770 INFO L93 Difference]: Finished difference Result 1218 states and 3963 transitions. [2021-06-05 22:04:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:04:07,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:07,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:07,772 INFO L225 Difference]: With dead ends: 1218 [2021-06-05 22:04:07,772 INFO L226 Difference]: Without dead ends: 1218 [2021-06-05 22:04:07,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-06-05 22:04:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 873. [2021-06-05 22:04:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-05 22:04:07,790 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-05 22:04:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:07,791 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-05 22:04:07,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-05 22:04:07,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:07,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:07,792 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:08,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:08,001 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:08,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1170147038, now seen corresponding path program 239 times [2021-06-05 22:04:08,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:08,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105502576] [2021-06-05 22:04:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:08,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:08,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105502576] [2021-06-05 22:04:08,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105502576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:08,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591040494] [2021-06-05 22:04:08,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:08,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:08,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:08,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:08,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:08,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591040494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:08,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:08,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:08,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483498044] [2021-06-05 22:04:08,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:08,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:08,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:08,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:08,316 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:09,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:09,258 INFO L93 Difference]: Finished difference Result 1333 states and 4195 transitions. [2021-06-05 22:04:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:04:09,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:09,260 INFO L225 Difference]: With dead ends: 1333 [2021-06-05 22:04:09,260 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 22:04:09,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 934.4ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 22:04:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 888. [2021-06-05 22:04:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4137542277339348) internal successors, (3028), 887 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3028 transitions. [2021-06-05 22:04:09,272 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3028 transitions. Word has length 20 [2021-06-05 22:04:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:09,272 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3028 transitions. [2021-06-05 22:04:09,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:09,272 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3028 transitions. [2021-06-05 22:04:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:09,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:09,273 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:09,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3536 [2021-06-05 22:04:09,473 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash 324265200, now seen corresponding path program 240 times [2021-06-05 22:04:09,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:09,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289741716] [2021-06-05 22:04:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:09,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:09,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289741716] [2021-06-05 22:04:09,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289741716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:09,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165919821] [2021-06-05 22:04:09,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:09,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:09,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:09,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165919821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:09,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:09,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:09,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929627207] [2021-06-05 22:04:09,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:09,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:09,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:09,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:09,728 INFO L87 Difference]: Start difference. First operand 888 states and 3028 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:10,588 INFO L93 Difference]: Finished difference Result 1481 states and 4564 transitions. [2021-06-05 22:04:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:04:10,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:10,590 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 22:04:10,590 INFO L226 Difference]: Without dead ends: 1481 [2021-06-05 22:04:10,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 799.2ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-05 22:04:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 892. [2021-06-05 22:04:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-05 22:04:10,602 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-05 22:04:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:10,602 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-05 22:04:10,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-05 22:04:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:10,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:10,603 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:10,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3544 [2021-06-05 22:04:10,803 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:10,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1169642522, now seen corresponding path program 241 times [2021-06-05 22:04:10,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:10,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123211955] [2021-06-05 22:04:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:10,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123211955] [2021-06-05 22:04:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123211955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270751038] [2021-06-05 22:04:10,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:10,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:10,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:11,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270751038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:11,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:11,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:11,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600663400] [2021-06-05 22:04:11,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:11,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:11,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:11,052 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:11,591 INFO L93 Difference]: Finished difference Result 1429 states and 4457 transitions. [2021-06-05 22:04:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:11,592 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 22:04:11,592 INFO L226 Difference]: Without dead ends: 1423 [2021-06-05 22:04:11,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-05 22:04:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 898. [2021-06-05 22:04:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4091415830546263) internal successors, (3058), 897 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3058 transitions. [2021-06-05 22:04:11,604 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3058 transitions. Word has length 20 [2021-06-05 22:04:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:11,604 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3058 transitions. [2021-06-05 22:04:11,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3058 transitions. [2021-06-05 22:04:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:11,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:11,605 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:11,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:11,805 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1684381940, now seen corresponding path program 242 times [2021-06-05 22:04:11,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:11,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666147219] [2021-06-05 22:04:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:11,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666147219] [2021-06-05 22:04:11,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666147219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679117300] [2021-06-05 22:04:11,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:11,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:11,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:11,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:12,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679117300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:12,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:12,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:12,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169177245] [2021-06-05 22:04:12,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:12,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:12,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:12,091 INFO L87 Difference]: Start difference. First operand 898 states and 3058 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:12,912 INFO L93 Difference]: Finished difference Result 1305 states and 4149 transitions. [2021-06-05 22:04:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:12,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:12,914 INFO L225 Difference]: With dead ends: 1305 [2021-06-05 22:04:12,914 INFO L226 Difference]: Without dead ends: 1305 [2021-06-05 22:04:12,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 817.3ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-06-05 22:04:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 895. [2021-06-05 22:04:12,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.411633109619687) internal successors, (3050), 894 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3050 transitions. [2021-06-05 22:04:12,925 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3050 transitions. Word has length 20 [2021-06-05 22:04:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:12,925 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3050 transitions. [2021-06-05 22:04:12,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3050 transitions. [2021-06-05 22:04:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:12,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:12,926 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:13,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 22:04:13,126 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:13,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:13,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1939683514, now seen corresponding path program 243 times [2021-06-05 22:04:13,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:13,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011920899] [2021-06-05 22:04:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:13,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:13,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011920899] [2021-06-05 22:04:13,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011920899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:13,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435526738] [2021-06-05 22:04:13,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:13,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:13,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:13,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435526738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:13,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:13,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:13,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188081775] [2021-06-05 22:04:13,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:13,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:13,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:13,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:13,439 INFO L87 Difference]: Start difference. First operand 895 states and 3050 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:14,412 INFO L93 Difference]: Finished difference Result 1292 states and 4096 transitions. [2021-06-05 22:04:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:04:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:14,414 INFO L225 Difference]: With dead ends: 1292 [2021-06-05 22:04:14,414 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 22:04:14,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 941.6ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 22:04:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 899. [2021-06-05 22:04:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4120267260579062) internal successors, (3064), 898 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3064 transitions. [2021-06-05 22:04:14,426 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3064 transitions. Word has length 20 [2021-06-05 22:04:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:14,426 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3064 transitions. [2021-06-05 22:04:14,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3064 transitions. [2021-06-05 22:04:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:14,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:14,427 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:14,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:14,627 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:14,627 INFO L82 PathProgramCache]: Analyzing trace with hash 12619042, now seen corresponding path program 244 times [2021-06-05 22:04:14,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:14,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037161367] [2021-06-05 22:04:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:14,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:14,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037161367] [2021-06-05 22:04:14,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037161367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:14,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229915780] [2021-06-05 22:04:14,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:14,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:14,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:14,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:14,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:14,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229915780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:14,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:14,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:14,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061731020] [2021-06-05 22:04:14,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:14,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:14,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:14,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:14,962 INFO L87 Difference]: Start difference. First operand 899 states and 3064 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:15,900 INFO L93 Difference]: Finished difference Result 1226 states and 3964 transitions. [2021-06-05 22:04:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:15,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:15,902 INFO L225 Difference]: With dead ends: 1226 [2021-06-05 22:04:15,902 INFO L226 Difference]: Without dead ends: 1226 [2021-06-05 22:04:15,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 947.3ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-06-05 22:04:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 897. [2021-06-05 22:04:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4140625) internal successors, (3059), 896 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3059 transitions. [2021-06-05 22:04:15,912 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3059 transitions. Word has length 20 [2021-06-05 22:04:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:15,912 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3059 transitions. [2021-06-05 22:04:15,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3059 transitions. [2021-06-05 22:04:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:15,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:15,913 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:16,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:16,114 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:16,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1075665638, now seen corresponding path program 245 times [2021-06-05 22:04:16,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:16,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372091228] [2021-06-05 22:04:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:16,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:16,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372091228] [2021-06-05 22:04:16,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372091228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:16,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999140867] [2021-06-05 22:04:16,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:16,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:16,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:16,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:16,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:16,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999140867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:16,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:16,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:16,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20212597] [2021-06-05 22:04:16,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:16,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:16,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:16,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:16,388 INFO L87 Difference]: Start difference. First operand 897 states and 3059 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:17,123 INFO L93 Difference]: Finished difference Result 1318 states and 4204 transitions. [2021-06-05 22:04:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:17,125 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 22:04:17,125 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 22:04:17,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 22:04:17,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 888. [2021-06-05 22:04:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.41826381059752) internal successors, (3032), 887 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3032 transitions. [2021-06-05 22:04:17,136 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3032 transitions. Word has length 20 [2021-06-05 22:04:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:17,136 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3032 transitions. [2021-06-05 22:04:17,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3032 transitions. [2021-06-05 22:04:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:17,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:17,137 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:17,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3592,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:17,337 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:17,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1926959258, now seen corresponding path program 246 times [2021-06-05 22:04:17,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:17,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102425278] [2021-06-05 22:04:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:17,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:17,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102425278] [2021-06-05 22:04:17,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102425278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:17,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464329657] [2021-06-05 22:04:17,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:17,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:17,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:17,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:17,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:17,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464329657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:17,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:17,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:17,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369123315] [2021-06-05 22:04:17,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:17,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:17,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:17,607 INFO L87 Difference]: Start difference. First operand 888 states and 3032 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:18,378 INFO L93 Difference]: Finished difference Result 1287 states and 4137 transitions. [2021-06-05 22:04:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:18,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:18,380 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 22:04:18,380 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 22:04:18,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:18,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 22:04:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 887. [2021-06-05 22:04:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.415349887133183) internal successors, (3026), 886 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3026 transitions. [2021-06-05 22:04:18,390 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3026 transitions. Word has length 20 [2021-06-05 22:04:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:18,390 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3026 transitions. [2021-06-05 22:04:18,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3026 transitions. [2021-06-05 22:04:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:18,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:18,392 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:18,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:18,592 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1096402166, now seen corresponding path program 247 times [2021-06-05 22:04:18,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:18,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948064742] [2021-06-05 22:04:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:18,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:18,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948064742] [2021-06-05 22:04:18,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948064742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:18,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699772661] [2021-06-05 22:04:18,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699772661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:18,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:18,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:18,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433646390] [2021-06-05 22:04:18,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:18,848 INFO L87 Difference]: Start difference. First operand 887 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:19,395 INFO L93 Difference]: Finished difference Result 1319 states and 4182 transitions. [2021-06-05 22:04:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:19,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:19,396 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 22:04:19,396 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 22:04:19,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 508.6ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 22:04:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 897. [2021-06-05 22:04:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4073660714285716) internal successors, (3053), 896 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3053 transitions. [2021-06-05 22:04:19,407 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3053 transitions. Word has length 20 [2021-06-05 22:04:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:19,407 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3053 transitions. [2021-06-05 22:04:19,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3053 transitions. [2021-06-05 22:04:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:19,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:19,409 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:19,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-05 22:04:19,609 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash -819021760, now seen corresponding path program 248 times [2021-06-05 22:04:19,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:19,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395086681] [2021-06-05 22:04:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:19,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:19,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395086681] [2021-06-05 22:04:19,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395086681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:19,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853841117] [2021-06-05 22:04:19,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:19,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:19,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853841117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:19,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:19,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669836297] [2021-06-05 22:04:19,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:19,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:19,886 INFO L87 Difference]: Start difference. First operand 897 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:20,583 INFO L93 Difference]: Finished difference Result 1230 states and 3985 transitions. [2021-06-05 22:04:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:20,584 INFO L225 Difference]: With dead ends: 1230 [2021-06-05 22:04:20,584 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 22:04:20,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 22:04:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 887. [2021-06-05 22:04:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.415349887133183) internal successors, (3026), 886 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3026 transitions. [2021-06-05 22:04:20,595 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3026 transitions. Word has length 20 [2021-06-05 22:04:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:20,595 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3026 transitions. [2021-06-05 22:04:20,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3026 transitions. [2021-06-05 22:04:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:20,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:20,596 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:20,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3616 [2021-06-05 22:04:20,796 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1591996514, now seen corresponding path program 249 times [2021-06-05 22:04:20,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:20,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92322239] [2021-06-05 22:04:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:20,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:20,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92322239] [2021-06-05 22:04:20,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92322239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:20,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617126329] [2021-06-05 22:04:20,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:20,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:20,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:20,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:20,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:21,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617126329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:21,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:21,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:21,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124189344] [2021-06-05 22:04:21,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:21,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:21,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:21,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:21,108 INFO L87 Difference]: Start difference. First operand 887 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:21,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:21,701 INFO L93 Difference]: Finished difference Result 1205 states and 3896 transitions. [2021-06-05 22:04:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:21,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:21,703 INFO L225 Difference]: With dead ends: 1205 [2021-06-05 22:04:21,703 INFO L226 Difference]: Without dead ends: 1205 [2021-06-05 22:04:21,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-05 22:04:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 886. [2021-06-05 22:04:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4135593220338984) internal successors, (3021), 885 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3021 transitions. [2021-06-05 22:04:21,714 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3021 transitions. Word has length 20 [2021-06-05 22:04:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:21,714 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3021 transitions. [2021-06-05 22:04:21,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3021 transitions. [2021-06-05 22:04:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:21,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:21,715 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:21,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3624 [2021-06-05 22:04:21,915 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:21,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:21,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1078633014, now seen corresponding path program 250 times [2021-06-05 22:04:21,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:21,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432784708] [2021-06-05 22:04:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:21,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:21,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432784708] [2021-06-05 22:04:21,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432784708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:21,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223564234] [2021-06-05 22:04:21,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:22,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:22,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:22,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223564234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:22,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:22,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:22,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497152958] [2021-06-05 22:04:22,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:22,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:22,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:22,233 INFO L87 Difference]: Start difference. First operand 886 states and 3021 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:22,883 INFO L93 Difference]: Finished difference Result 1169 states and 3816 transitions. [2021-06-05 22:04:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:04:22,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:22,884 INFO L225 Difference]: With dead ends: 1169 [2021-06-05 22:04:22,884 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 22:04:22,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 636.7ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 22:04:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 874. [2021-06-05 22:04:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-05 22:04:22,894 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-05 22:04:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:22,894 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-05 22:04:22,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-05 22:04:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:22,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:22,895 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:23,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:23,096 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1669793570, now seen corresponding path program 251 times [2021-06-05 22:04:23,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:23,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50583583] [2021-06-05 22:04:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:23,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:23,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50583583] [2021-06-05 22:04:23,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50583583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364000177] [2021-06-05 22:04:23,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:23,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:23,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:23,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:23,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364000177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:23,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:23,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829617241] [2021-06-05 22:04:23,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:23,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:23,331 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:23,697 INFO L93 Difference]: Finished difference Result 1140 states and 3669 transitions. [2021-06-05 22:04:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:23,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:23,699 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 22:04:23,699 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 22:04:23,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 22:04:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 877. [2021-06-05 22:04:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.41324200913242) internal successors, (2990), 876 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2990 transitions. [2021-06-05 22:04:23,708 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2990 transitions. Word has length 20 [2021-06-05 22:04:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:23,708 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2990 transitions. [2021-06-05 22:04:23,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2990 transitions. [2021-06-05 22:04:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:23,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:23,710 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:23,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3642,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:23,910 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1916815508, now seen corresponding path program 252 times [2021-06-05 22:04:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:23,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814702545] [2021-06-05 22:04:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:23,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:23,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814702545] [2021-06-05 22:04:23,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814702545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982739321] [2021-06-05 22:04:23,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:24,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:24,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:24,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:24,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982739321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:24,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:24,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:24,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293823995] [2021-06-05 22:04:24,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:24,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:24,147 INFO L87 Difference]: Start difference. First operand 877 states and 2990 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:24,819 INFO L93 Difference]: Finished difference Result 1255 states and 3956 transitions. [2021-06-05 22:04:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:04:24,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:24,821 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 22:04:24,821 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 22:04:24,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:04:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 22:04:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 880. [2021-06-05 22:04:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-05 22:04:24,831 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-05 22:04:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:24,831 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-05 22:04:24,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-05 22:04:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:24,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:24,832 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:25,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:25,033 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash 884244066, now seen corresponding path program 253 times [2021-06-05 22:04:25,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:25,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314141803] [2021-06-05 22:04:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:25,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:25,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314141803] [2021-06-05 22:04:25,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314141803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:25,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287197357] [2021-06-05 22:04:25,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:25,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:25,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287197357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:25,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:25,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:25,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99653335] [2021-06-05 22:04:25,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:25,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:25,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:25,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:25,280 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:25,684 INFO L93 Difference]: Finished difference Result 1189 states and 3781 transitions. [2021-06-05 22:04:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:04:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:25,685 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 22:04:25,686 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 22:04:25,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 22:04:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 874. [2021-06-05 22:04:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-05 22:04:25,695 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-05 22:04:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:25,695 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-05 22:04:25,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-05 22:04:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:25,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:25,697 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:25,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3649,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:25,897 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1223044570, now seen corresponding path program 254 times [2021-06-05 22:04:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:25,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785059042] [2021-06-05 22:04:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:25,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:25,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785059042] [2021-06-05 22:04:25,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785059042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:25,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010755500] [2021-06-05 22:04:25,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:26,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:26,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010755500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:26,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:26,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:26,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511285557] [2021-06-05 22:04:26,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:26,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:26,148 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:26,526 INFO L93 Difference]: Finished difference Result 1182 states and 3754 transitions. [2021-06-05 22:04:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:26,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:26,528 INFO L225 Difference]: With dead ends: 1182 [2021-06-05 22:04:26,528 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 22:04:26,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 22:04:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 893. [2021-06-05 22:04:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4091928251121075) internal successors, (3041), 892 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3041 transitions. [2021-06-05 22:04:26,538 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3041 transitions. Word has length 20 [2021-06-05 22:04:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:26,538 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3041 transitions. [2021-06-05 22:04:26,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3041 transitions. [2021-06-05 22:04:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:26,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:26,539 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:26,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:26,739 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1222540054, now seen corresponding path program 255 times [2021-06-05 22:04:26,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:26,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584327619] [2021-06-05 22:04:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:26,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:26,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584327619] [2021-06-05 22:04:26,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584327619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:26,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453391022] [2021-06-05 22:04:26,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:26,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:26,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:26,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:26,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453391022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:26,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:26,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:26,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226001964] [2021-06-05 22:04:26,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:26,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:26,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:26,994 INFO L87 Difference]: Start difference. First operand 893 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:27,493 INFO L93 Difference]: Finished difference Result 1195 states and 3797 transitions. [2021-06-05 22:04:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:04:27,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:27,495 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 22:04:27,495 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 22:04:27,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 22:04:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 893. [2021-06-05 22:04:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.405829596412556) internal successors, (3038), 892 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3038 transitions. [2021-06-05 22:04:27,505 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3038 transitions. Word has length 20 [2021-06-05 22:04:27,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:27,505 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3038 transitions. [2021-06-05 22:04:27,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3038 transitions. [2021-06-05 22:04:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:27,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:27,506 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:27,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3658,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:27,706 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:27,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1631484408, now seen corresponding path program 256 times [2021-06-05 22:04:27,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:27,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032489382] [2021-06-05 22:04:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:27,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:27,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032489382] [2021-06-05 22:04:27,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032489382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:27,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505211893] [2021-06-05 22:04:27,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:27,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:27,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:27,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:27,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:27,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505211893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:27,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:27,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:27,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289821702] [2021-06-05 22:04:27,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:27,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:27,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:27,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:27,955 INFO L87 Difference]: Start difference. First operand 893 states and 3038 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:28,366 INFO L93 Difference]: Finished difference Result 1131 states and 3640 transitions. [2021-06-05 22:04:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:28,367 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 22:04:28,367 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 22:04:28,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 22:04:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 890. [2021-06-05 22:04:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.408323959505062) internal successors, (3030), 889 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3030 transitions. [2021-06-05 22:04:28,383 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3030 transitions. Word has length 20 [2021-06-05 22:04:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:28,383 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3030 transitions. [2021-06-05 22:04:28,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3030 transitions. [2021-06-05 22:04:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:28,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:28,384 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:28,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3663,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:28,585 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:28,585 INFO L82 PathProgramCache]: Analyzing trace with hash -514686352, now seen corresponding path program 257 times [2021-06-05 22:04:28,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:28,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852659149] [2021-06-05 22:04:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:28,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:28,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852659149] [2021-06-05 22:04:28,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852659149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:28,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027386002] [2021-06-05 22:04:28,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:28,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:28,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:28,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:28,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:28,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027386002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:28,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:28,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:28,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924944331] [2021-06-05 22:04:28,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:28,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:28,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:28,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:28,822 INFO L87 Difference]: Start difference. First operand 890 states and 3030 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:29,150 INFO L93 Difference]: Finished difference Result 1057 states and 3471 transitions. [2021-06-05 22:04:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:29,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:29,151 INFO L225 Difference]: With dead ends: 1057 [2021-06-05 22:04:29,151 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 22:04:29,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 22:04:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 871. [2021-06-05 22:04:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.418390804597701) internal successors, (2974), 870 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2974 transitions. [2021-06-05 22:04:29,161 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2974 transitions. Word has length 20 [2021-06-05 22:04:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:29,161 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2974 transitions. [2021-06-05 22:04:29,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2974 transitions. [2021-06-05 22:04:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:29,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:29,162 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:29,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3668 [2021-06-05 22:04:29,363 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2083858536, now seen corresponding path program 258 times [2021-06-05 22:04:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:29,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026179391] [2021-06-05 22:04:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:29,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:29,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026179391] [2021-06-05 22:04:29,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026179391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:29,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205714516] [2021-06-05 22:04:29,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:29,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:29,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:29,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:29,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205714516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:29,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:29,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:29,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395052129] [2021-06-05 22:04:29,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:29,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:29,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:29,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:29,627 INFO L87 Difference]: Start difference. First operand 871 states and 2974 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:30,083 INFO L93 Difference]: Finished difference Result 1173 states and 3762 transitions. [2021-06-05 22:04:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:30,085 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 22:04:30,085 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 22:04:30,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 22:04:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 878. [2021-06-05 22:04:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.419612314709236) internal successors, (2999), 877 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2999 transitions. [2021-06-05 22:04:30,095 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2999 transitions. Word has length 20 [2021-06-05 22:04:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:30,095 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2999 transitions. [2021-06-05 22:04:30,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2999 transitions. [2021-06-05 22:04:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:30,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:30,096 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:30,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 22:04:30,296 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:30,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1375500318, now seen corresponding path program 259 times [2021-06-05 22:04:30,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:30,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656376163] [2021-06-05 22:04:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:30,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:30,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656376163] [2021-06-05 22:04:30,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656376163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:30,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25209017] [2021-06-05 22:04:30,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:30,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:30,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:30,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25209017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:30,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:30,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022570589] [2021-06-05 22:04:30,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:30,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:30,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:30,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:30,567 INFO L87 Difference]: Start difference. First operand 878 states and 2999 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:31,460 INFO L93 Difference]: Finished difference Result 1387 states and 4260 transitions. [2021-06-05 22:04:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:04:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:31,462 INFO L225 Difference]: With dead ends: 1387 [2021-06-05 22:04:31,462 INFO L226 Difference]: Without dead ends: 1387 [2021-06-05 22:04:31,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:04:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-06-05 22:04:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 884. [2021-06-05 22:04:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.4246885617214042) internal successors, (3024), 883 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3024 transitions. [2021-06-05 22:04:31,473 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3024 transitions. Word has length 20 [2021-06-05 22:04:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:31,473 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3024 transitions. [2021-06-05 22:04:31,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3024 transitions. [2021-06-05 22:04:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:31,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:31,475 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:31,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:31,675 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1425559256, now seen corresponding path program 260 times [2021-06-05 22:04:31,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:31,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366483043] [2021-06-05 22:04:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:31,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:31,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366483043] [2021-06-05 22:04:31,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366483043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:31,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691921328] [2021-06-05 22:04:31,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:31,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:31,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691921328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:31,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:31,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278422848] [2021-06-05 22:04:31,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:31,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:31,930 INFO L87 Difference]: Start difference. First operand 884 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:32,401 INFO L93 Difference]: Finished difference Result 1250 states and 3939 transitions. [2021-06-05 22:04:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:04:32,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:32,403 INFO L225 Difference]: With dead ends: 1250 [2021-06-05 22:04:32,403 INFO L226 Difference]: Without dead ends: 1244 [2021-06-05 22:04:32,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-05 22:04:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 884. [2021-06-05 22:04:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-05 22:04:32,413 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-05 22:04:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:32,413 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-05 22:04:32,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-05 22:04:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:32,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:32,414 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:32,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3682,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:32,614 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:32,615 INFO L82 PathProgramCache]: Analyzing trace with hash 749468942, now seen corresponding path program 261 times [2021-06-05 22:04:32,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:32,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015902510] [2021-06-05 22:04:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:32,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:32,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015902510] [2021-06-05 22:04:32,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015902510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:32,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587065712] [2021-06-05 22:04:32,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:32,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:32,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:32,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:32,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587065712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:32,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:32,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:32,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684000599] [2021-06-05 22:04:32,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:32,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:32,897 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:33,614 INFO L93 Difference]: Finished difference Result 1109 states and 3593 transitions. [2021-06-05 22:04:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:33,615 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 22:04:33,616 INFO L226 Difference]: Without dead ends: 1095 [2021-06-05 22:04:33,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-05 22:04:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 884. [2021-06-05 22:04:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-05 22:04:33,625 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-05 22:04:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:33,626 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-05 22:04:33,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-05 22:04:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:33,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:33,627 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:33,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3691 [2021-06-05 22:04:33,837 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 373166306, now seen corresponding path program 262 times [2021-06-05 22:04:33,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:33,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307806221] [2021-06-05 22:04:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:33,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:33,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307806221] [2021-06-05 22:04:33,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307806221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:33,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740246649] [2021-06-05 22:04:33,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:33,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:33,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:33,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:33,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:34,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740246649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:34,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:34,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:34,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229277424] [2021-06-05 22:04:34,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:34,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:34,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:34,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:34,159 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:34,791 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-06-05 22:04:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:34,876 INFO L93 Difference]: Finished difference Result 1050 states and 3462 transitions. [2021-06-05 22:04:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:04:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:34,877 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 22:04:34,877 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 22:04:34,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 729.3ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 22:04:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 884. [2021-06-05 22:04:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-05 22:04:34,887 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-05 22:04:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:34,887 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-05 22:04:34,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-05 22:04:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:34,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:34,888 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:35,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:35,088 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash -265281438, now seen corresponding path program 263 times [2021-06-05 22:04:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:35,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982999733] [2021-06-05 22:04:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:35,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:35,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982999733] [2021-06-05 22:04:35,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982999733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:35,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003811764] [2021-06-05 22:04:35,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:35,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:35,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:35,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:35,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:35,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003811764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:35,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:35,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:35,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259778346] [2021-06-05 22:04:35,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:35,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:35,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:35,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:35,339 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:35,773 INFO L93 Difference]: Finished difference Result 1088 states and 3558 transitions. [2021-06-05 22:04:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:35,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:35,774 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 22:04:35,774 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 22:04:35,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 22:04:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 874. [2021-06-05 22:04:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4238258877434133) internal successors, (2989), 873 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2989 transitions. [2021-06-05 22:04:35,784 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2989 transitions. Word has length 20 [2021-06-05 22:04:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:35,784 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2989 transitions. [2021-06-05 22:04:35,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2989 transitions. [2021-06-05 22:04:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:35,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:35,785 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:35,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-06-05 22:04:35,985 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:35,986 INFO L82 PathProgramCache]: Analyzing trace with hash 917484642, now seen corresponding path program 264 times [2021-06-05 22:04:35,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:35,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280019572] [2021-06-05 22:04:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:36,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:36,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280019572] [2021-06-05 22:04:36,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280019572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775599940] [2021-06-05 22:04:36,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:36,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:36,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775599940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:36,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:36,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800770513] [2021-06-05 22:04:36,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:36,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:36,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:36,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:36,245 INFO L87 Difference]: Start difference. First operand 874 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:36,728 INFO L93 Difference]: Finished difference Result 1100 states and 3587 transitions. [2021-06-05 22:04:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:36,730 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 22:04:36,730 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 22:04:36,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 22:04:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 875. [2021-06-05 22:04:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.426773455377574) internal successors, (2995), 874 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2995 transitions. [2021-06-05 22:04:36,740 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2995 transitions. Word has length 20 [2021-06-05 22:04:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:36,740 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2995 transitions. [2021-06-05 22:04:36,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2995 transitions. [2021-06-05 22:04:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:36,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:36,741 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:36,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:36,942 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1039652314, now seen corresponding path program 265 times [2021-06-05 22:04:36,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:36,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766429893] [2021-06-05 22:04:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:37,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:37,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766429893] [2021-06-05 22:04:37,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766429893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:37,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335726314] [2021-06-05 22:04:37,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:37,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:37,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335726314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:37,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:37,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:37,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603376974] [2021-06-05 22:04:37,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:37,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:37,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:37,335 INFO L87 Difference]: Start difference. First operand 875 states and 2995 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:37,952 INFO L93 Difference]: Finished difference Result 1067 states and 3510 transitions. [2021-06-05 22:04:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:37,953 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 22:04:37,953 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 22:04:37,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 22:04:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 871. [2021-06-05 22:04:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.418390804597701) internal successors, (2974), 870 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2974 transitions. [2021-06-05 22:04:37,963 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2974 transitions. Word has length 20 [2021-06-05 22:04:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:37,963 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2974 transitions. [2021-06-05 22:04:37,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2974 transitions. [2021-06-05 22:04:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:37,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:37,964 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:38,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3717 [2021-06-05 22:04:38,173 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1438893466, now seen corresponding path program 266 times [2021-06-05 22:04:38,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:38,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649672933] [2021-06-05 22:04:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:38,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:38,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649672933] [2021-06-05 22:04:38,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649672933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:38,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545128703] [2021-06-05 22:04:38,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:38,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:38,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:38,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:38,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:38,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545128703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:38,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:38,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:38,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166367196] [2021-06-05 22:04:38,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:38,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:38,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:38,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:38,485 INFO L87 Difference]: Start difference. First operand 871 states and 2974 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:39,283 INFO L93 Difference]: Finished difference Result 1241 states and 3910 transitions. [2021-06-05 22:04:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:04:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:39,285 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 22:04:39,285 INFO L226 Difference]: Without dead ends: 1234 [2021-06-05 22:04:39,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:04:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-05 22:04:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 886. [2021-06-05 22:04:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4192090395480226) internal successors, (3026), 885 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3026 transitions. [2021-06-05 22:04:39,295 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3026 transitions. Word has length 20 [2021-06-05 22:04:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:39,295 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3026 transitions. [2021-06-05 22:04:39,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3026 transitions. [2021-06-05 22:04:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:39,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:39,297 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:39,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3723,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:39,497 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:39,497 INFO L82 PathProgramCache]: Analyzing trace with hash 55518772, now seen corresponding path program 267 times [2021-06-05 22:04:39,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:39,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994587911] [2021-06-05 22:04:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:39,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:39,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994587911] [2021-06-05 22:04:39,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994587911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:39,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637685451] [2021-06-05 22:04:39,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:39,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:39,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:39,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637685451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:39,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:39,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:39,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820964196] [2021-06-05 22:04:39,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:39,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:39,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:39,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:39,806 INFO L87 Difference]: Start difference. First operand 886 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:40,703 INFO L93 Difference]: Finished difference Result 1372 states and 4241 transitions. [2021-06-05 22:04:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:04:40,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:40,705 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 22:04:40,705 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 22:04:40,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 834.1ms TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 22:04:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 890. [2021-06-05 22:04:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4263217097862766) internal successors, (3046), 889 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3046 transitions. [2021-06-05 22:04:40,716 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3046 transitions. Word has length 20 [2021-06-05 22:04:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:40,716 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3046 transitions. [2021-06-05 22:04:40,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3046 transitions. [2021-06-05 22:04:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:40,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:40,717 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:40,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3731,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:40,918 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1438388950, now seen corresponding path program 268 times [2021-06-05 22:04:40,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:40,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733266562] [2021-06-05 22:04:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:40,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:40,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733266562] [2021-06-05 22:04:40,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733266562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:40,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712609247] [2021-06-05 22:04:40,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:41,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:41,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:41,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712609247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:41,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:41,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804881879] [2021-06-05 22:04:41,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:41,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:41,179 INFO L87 Difference]: Start difference. First operand 890 states and 3046 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:41,690 INFO L93 Difference]: Finished difference Result 1305 states and 4097 transitions. [2021-06-05 22:04:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:41,692 INFO L225 Difference]: With dead ends: 1305 [2021-06-05 22:04:41,692 INFO L226 Difference]: Without dead ends: 1299 [2021-06-05 22:04:41,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-05 22:04:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 896. [2021-06-05 22:04:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.4145251396648044) internal successors, (3056), 895 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3056 transitions. [2021-06-05 22:04:41,702 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3056 transitions. Word has length 20 [2021-06-05 22:04:41,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:41,702 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 3056 transitions. [2021-06-05 22:04:41,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3056 transitions. [2021-06-05 22:04:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:41,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:41,704 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:41,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-06-05 22:04:41,904 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:41,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1415635512, now seen corresponding path program 269 times [2021-06-05 22:04:41,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:41,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638948888] [2021-06-05 22:04:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:41,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:41,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638948888] [2021-06-05 22:04:41,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638948888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:41,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286155759] [2021-06-05 22:04:41,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:42,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:42,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286155759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:42,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:42,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:42,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440499820] [2021-06-05 22:04:42,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:42,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:42,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:42,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:42,183 INFO L87 Difference]: Start difference. First operand 896 states and 3056 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:42,830 INFO L93 Difference]: Finished difference Result 1219 states and 3879 transitions. [2021-06-05 22:04:42,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:42,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:42,832 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 22:04:42,832 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 22:04:42,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 22:04:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 893. [2021-06-05 22:04:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4170403587443947) internal successors, (3048), 892 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3048 transitions. [2021-06-05 22:04:42,842 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3048 transitions. Word has length 20 [2021-06-05 22:04:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:42,843 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3048 transitions. [2021-06-05 22:04:42,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3048 transitions. [2021-06-05 22:04:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:42,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:42,844 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:43,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3747 [2021-06-05 22:04:43,044 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1670937086, now seen corresponding path program 270 times [2021-06-05 22:04:43,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:43,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679258279] [2021-06-05 22:04:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:43,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:43,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679258279] [2021-06-05 22:04:43,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679258279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:43,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139841873] [2021-06-05 22:04:43,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:43,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:43,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:43,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139841873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:43,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:43,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:43,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186948203] [2021-06-05 22:04:43,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:43,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:43,380 INFO L87 Difference]: Start difference. First operand 893 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:43,677 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 22:04:43,870 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 22:04:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:44,237 INFO L93 Difference]: Finished difference Result 1200 states and 3811 transitions. [2021-06-05 22:04:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:04:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:44,239 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 22:04:44,239 INFO L226 Difference]: Without dead ends: 1193 [2021-06-05 22:04:44,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-06-05 22:04:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 897. [2021-06-05 22:04:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4174107142857144) internal successors, (3062), 896 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3062 transitions. [2021-06-05 22:04:44,249 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3062 transitions. Word has length 20 [2021-06-05 22:04:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:44,249 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3062 transitions. [2021-06-05 22:04:44,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3062 transitions. [2021-06-05 22:04:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:44,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:44,250 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:44,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3757,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:44,451 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash -256127386, now seen corresponding path program 271 times [2021-06-05 22:04:44,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:44,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967742949] [2021-06-05 22:04:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:44,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:44,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967742949] [2021-06-05 22:04:44,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967742949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:44,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460182402] [2021-06-05 22:04:44,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:44,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:44,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460182402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:44,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:44,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:44,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847222778] [2021-06-05 22:04:44,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:44,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:44,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:44,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:44,740 INFO L87 Difference]: Start difference. First operand 897 states and 3062 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:45,439 INFO L93 Difference]: Finished difference Result 1122 states and 3649 transitions. [2021-06-05 22:04:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:45,440 INFO L225 Difference]: With dead ends: 1122 [2021-06-05 22:04:45,440 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 22:04:45,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 22:04:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 895. [2021-06-05 22:04:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4194630872483223) internal successors, (3057), 894 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3057 transitions. [2021-06-05 22:04:45,450 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3057 transitions. Word has length 20 [2021-06-05 22:04:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:45,450 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3057 transitions. [2021-06-05 22:04:45,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3057 transitions. [2021-06-05 22:04:45,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:45,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:45,452 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:45,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3769 [2021-06-05 22:04:45,652 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:45,652 INFO L82 PathProgramCache]: Analyzing trace with hash 806919210, now seen corresponding path program 272 times [2021-06-05 22:04:45,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:45,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78091892] [2021-06-05 22:04:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:45,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:45,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78091892] [2021-06-05 22:04:45,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78091892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:45,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497274513] [2021-06-05 22:04:45,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:45,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:45,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:45,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:45,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497274513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:45,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:45,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:45,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042921724] [2021-06-05 22:04:45,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:45,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:45,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:45,918 INFO L87 Difference]: Start difference. First operand 895 states and 3057 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:46,566 INFO L93 Difference]: Finished difference Result 1196 states and 3849 transitions. [2021-06-05 22:04:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:46,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:46,568 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 22:04:46,568 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 22:04:46,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:46,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 22:04:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 886. [2021-06-05 22:04:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4237288135593222) internal successors, (3030), 885 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3030 transitions. [2021-06-05 22:04:46,578 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3030 transitions. Word has length 20 [2021-06-05 22:04:46,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:46,578 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3030 transitions. [2021-06-05 22:04:46,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3030 transitions. [2021-06-05 22:04:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:46,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:46,579 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:46,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:46,780 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2099261610, now seen corresponding path program 273 times [2021-06-05 22:04:46,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:46,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915280097] [2021-06-05 22:04:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:46,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:46,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915280097] [2021-06-05 22:04:46,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915280097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:46,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53371848] [2021-06-05 22:04:46,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:46,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:04:46,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:46,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:46,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:47,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53371848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:47,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:47,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:47,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850874977] [2021-06-05 22:04:47,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:47,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:47,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:47,054 INFO L87 Difference]: Start difference. First operand 886 states and 3030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:47,714 INFO L93 Difference]: Finished difference Result 1165 states and 3782 transitions. [2021-06-05 22:04:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:47,716 INFO L225 Difference]: With dead ends: 1165 [2021-06-05 22:04:47,716 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 22:04:47,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 605.5ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 22:04:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 885. [2021-06-05 22:04:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.420814479638009) internal successors, (3024), 884 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3024 transitions. [2021-06-05 22:04:47,726 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3024 transitions. Word has length 20 [2021-06-05 22:04:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:47,726 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3024 transitions. [2021-06-05 22:04:47,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3024 transitions. [2021-06-05 22:04:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:47,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:47,727 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:47,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:47,928 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash 827655738, now seen corresponding path program 274 times [2021-06-05 22:04:47,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:47,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475729189] [2021-06-05 22:04:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:47,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:47,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475729189] [2021-06-05 22:04:47,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475729189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:47,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109639781] [2021-06-05 22:04:47,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:48,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:48,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:48,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109639781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:48,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:48,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:48,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213228793] [2021-06-05 22:04:48,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:48,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:48,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:48,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:48,200 INFO L87 Difference]: Start difference. First operand 885 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:48,742 INFO L93 Difference]: Finished difference Result 1195 states and 3822 transitions. [2021-06-05 22:04:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:48,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:48,744 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 22:04:48,744 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 22:04:48,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 22:04:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 895. [2021-06-05 22:04:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4149888143176734) internal successors, (3053), 894 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3053 transitions. [2021-06-05 22:04:48,754 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3053 transitions. Word has length 20 [2021-06-05 22:04:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:48,754 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3053 transitions. [2021-06-05 22:04:48,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3053 transitions. [2021-06-05 22:04:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:48,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:48,755 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:48,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3792 [2021-06-05 22:04:48,956 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:48,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1087768188, now seen corresponding path program 275 times [2021-06-05 22:04:48,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:48,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112527985] [2021-06-05 22:04:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:49,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:49,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112527985] [2021-06-05 22:04:49,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112527985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:49,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916014408] [2021-06-05 22:04:49,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:49,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:49,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:49,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:49,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916014408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:49,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:49,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:49,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078700799] [2021-06-05 22:04:49,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:49,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:49,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:49,238 INFO L87 Difference]: Start difference. First operand 895 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:49,862 INFO L93 Difference]: Finished difference Result 1106 states and 3625 transitions. [2021-06-05 22:04:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:49,864 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 22:04:49,864 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 22:04:49,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 607.9ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:04:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 22:04:49,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 885. [2021-06-05 22:04:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.420814479638009) internal successors, (3024), 884 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3024 transitions. [2021-06-05 22:04:49,873 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3024 transitions. Word has length 20 [2021-06-05 22:04:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:49,873 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3024 transitions. [2021-06-05 22:04:49,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3024 transitions. [2021-06-05 22:04:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:49,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:49,874 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:50,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:50,075 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1323250086, now seen corresponding path program 276 times [2021-06-05 22:04:50,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:50,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44417843] [2021-06-05 22:04:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:50,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:50,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44417843] [2021-06-05 22:04:50,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44417843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:50,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151498739] [2021-06-05 22:04:50,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:50,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:04:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:50,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:50,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151498739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:50,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:50,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:50,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045560328] [2021-06-05 22:04:50,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:50,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:50,351 INFO L87 Difference]: Start difference. First operand 885 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:50,919 INFO L93 Difference]: Finished difference Result 1107 states and 3596 transitions. [2021-06-05 22:04:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:50,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:50,920 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 22:04:50,920 INFO L226 Difference]: Without dead ends: 1107 [2021-06-05 22:04:50,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 514.3ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-06-05 22:04:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 884. [2021-06-05 22:04:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.419026047565119) internal successors, (3019), 883 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3019 transitions. [2021-06-05 22:04:50,930 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3019 transitions. Word has length 20 [2021-06-05 22:04:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:50,930 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3019 transitions. [2021-06-05 22:04:50,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3019 transitions. [2021-06-05 22:04:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:50,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:50,931 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:51,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3805 [2021-06-05 22:04:51,132 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1347379442, now seen corresponding path program 277 times [2021-06-05 22:04:51,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:51,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306937960] [2021-06-05 22:04:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:51,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:51,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306937960] [2021-06-05 22:04:51,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306937960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:51,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087011885] [2021-06-05 22:04:51,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:51,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:51,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087011885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:51,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:51,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:04:51,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093757350] [2021-06-05 22:04:51,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:04:51,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:04:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:04:51,431 INFO L87 Difference]: Start difference. First operand 884 states and 3019 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:51,724 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 22:04:51,933 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 22:04:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:52,093 INFO L93 Difference]: Finished difference Result 1071 states and 3516 transitions. [2021-06-05 22:04:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:52,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:52,094 INFO L225 Difference]: With dead ends: 1071 [2021-06-05 22:04:52,094 INFO L226 Difference]: Without dead ends: 1071 [2021-06-05 22:04:52,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 637.9ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-05 22:04:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 872. [2021-06-05 22:04:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.421354764638347) internal successors, (2980), 871 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2980 transitions. [2021-06-05 22:04:52,104 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2980 transitions. Word has length 20 [2021-06-05 22:04:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:52,104 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2980 transitions. [2021-06-05 22:04:52,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2980 transitions. [2021-06-05 22:04:52,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:52,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:52,105 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:52,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-06-05 22:04:52,305 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:52,306 INFO L82 PathProgramCache]: Analyzing trace with hash 188874260, now seen corresponding path program 278 times [2021-06-05 22:04:52,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:52,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28203226] [2021-06-05 22:04:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:52,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:52,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28203226] [2021-06-05 22:04:52,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28203226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:52,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728901294] [2021-06-05 22:04:52,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:52,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:52,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:52,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:52,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728901294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:52,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:52,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586659954] [2021-06-05 22:04:52,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:52,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:52,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:52,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:52,594 INFO L87 Difference]: Start difference. First operand 872 states and 2980 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:53,002 INFO L93 Difference]: Finished difference Result 1207 states and 3830 transitions. [2021-06-05 22:04:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:53,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:53,004 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 22:04:53,004 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 22:04:53,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:04:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 22:04:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 892. [2021-06-05 22:04:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-05 22:04:53,021 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-05 22:04:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:53,021 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-05 22:04:53,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-05 22:04:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:53,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:53,022 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:53,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:53,222 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:53,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2044728718, now seen corresponding path program 279 times [2021-06-05 22:04:53,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:53,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672598283] [2021-06-05 22:04:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:53,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:53,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672598283] [2021-06-05 22:04:53,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672598283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:53,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391906312] [2021-06-05 22:04:53,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:53,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:53,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:53,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391906312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:53,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:53,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:53,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649611941] [2021-06-05 22:04:53,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:53,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:53,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:53,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:53,499 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:54,088 INFO L93 Difference]: Finished difference Result 1234 states and 3901 transitions. [2021-06-05 22:04:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:04:54,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:54,090 INFO L225 Difference]: With dead ends: 1234 [2021-06-05 22:04:54,090 INFO L226 Difference]: Without dead ends: 1234 [2021-06-05 22:04:54,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-05 22:04:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 892. [2021-06-05 22:04:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-05 22:04:54,101 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-05 22:04:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:54,101 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-05 22:04:54,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-05 22:04:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:54,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:54,102 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:54,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3839 [2021-06-05 22:04:54,302 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash 189378776, now seen corresponding path program 280 times [2021-06-05 22:04:54,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:54,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454953175] [2021-06-05 22:04:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:54,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454953175] [2021-06-05 22:04:54,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454953175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:54,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872927628] [2021-06-05 22:04:54,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:54,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:54,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:54,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872927628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:54,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:54,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:54,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469201048] [2021-06-05 22:04:54,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:54,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:54,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:54,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:54,595 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:55,261 INFO L93 Difference]: Finished difference Result 1226 states and 3873 transitions. [2021-06-05 22:04:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:04:55,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:55,263 INFO L225 Difference]: With dead ends: 1226 [2021-06-05 22:04:55,263 INFO L226 Difference]: Without dead ends: 1220 [2021-06-05 22:04:55,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 635.8ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-05 22:04:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 892. [2021-06-05 22:04:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4175084175084174) internal successors, (3045), 891 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3045 transitions. [2021-06-05 22:04:55,273 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3045 transitions. Word has length 20 [2021-06-05 22:04:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:55,274 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3045 transitions. [2021-06-05 22:04:55,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3045 transitions. [2021-06-05 22:04:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:55,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:55,275 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:55,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3847 [2021-06-05 22:04:55,475 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:55,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1251564058, now seen corresponding path program 281 times [2021-06-05 22:04:55,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:55,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618137016] [2021-06-05 22:04:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:55,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:55,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618137016] [2021-06-05 22:04:55,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618137016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:55,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936471982] [2021-06-05 22:04:55,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:55,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:04:55,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:55,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936471982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:55,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:55,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398628922] [2021-06-05 22:04:55,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:55,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:55,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:55,754 INFO L87 Difference]: Start difference. First operand 892 states and 3045 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:56,265 INFO L93 Difference]: Finished difference Result 1191 states and 3783 transitions. [2021-06-05 22:04:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:04:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:56,267 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 22:04:56,267 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 22:04:56,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 499.5ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 22:04:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 889. [2021-06-05 22:04:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.420045045045045) internal successors, (3037), 888 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3037 transitions. [2021-06-05 22:04:56,278 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3037 transitions. Word has length 20 [2021-06-05 22:04:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:56,278 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3037 transitions. [2021-06-05 22:04:56,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3037 transitions. [2021-06-05 22:04:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:56,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:56,279 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:56,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-06-05 22:04:56,493 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash 727234354, now seen corresponding path program 282 times [2021-06-05 22:04:56,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:56,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916612457] [2021-06-05 22:04:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:56,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:56,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916612457] [2021-06-05 22:04:56,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916612457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:56,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156908212] [2021-06-05 22:04:56,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:56,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:04:56,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:56,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:56,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156908212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:56,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:56,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:56,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328713794] [2021-06-05 22:04:56,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:56,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:56,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:56,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:56,786 INFO L87 Difference]: Start difference. First operand 889 states and 3037 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:57,414 INFO L93 Difference]: Finished difference Result 1135 states and 3660 transitions. [2021-06-05 22:04:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:57,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:57,416 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 22:04:57,416 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:04:57,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:04:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 889. [2021-06-05 22:04:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4166666666666665) internal successors, (3034), 888 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3034 transitions. [2021-06-05 22:04:57,426 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3034 transitions. Word has length 20 [2021-06-05 22:04:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:57,426 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3034 transitions. [2021-06-05 22:04:57,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3034 transitions. [2021-06-05 22:04:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:57,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:57,427 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:57,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:57,627 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 897232478, now seen corresponding path program 283 times [2021-06-05 22:04:57,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:57,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122697574] [2021-06-05 22:04:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:57,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:57,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122697574] [2021-06-05 22:04:57,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122697574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:57,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954544214] [2021-06-05 22:04:57,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:57,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954544214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:57,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:57,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:57,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574015791] [2021-06-05 22:04:57,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:57,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:57,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:57,885 INFO L87 Difference]: Start difference. First operand 889 states and 3034 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:58,282 INFO L93 Difference]: Finished difference Result 1101 states and 3597 transitions. [2021-06-05 22:04:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:04:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:58,284 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 22:04:58,284 INFO L226 Difference]: Without dead ends: 1101 [2021-06-05 22:04:58,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-05 22:04:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 886. [2021-06-05 22:04:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4192090395480226) internal successors, (3026), 885 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3026 transitions. [2021-06-05 22:04:58,294 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3026 transitions. Word has length 20 [2021-06-05 22:04:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:58,294 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3026 transitions. [2021-06-05 22:04:58,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3026 transitions. [2021-06-05 22:04:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:58,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:58,295 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:58,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-06-05 22:04:58,495 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2007451358, now seen corresponding path program 284 times [2021-06-05 22:04:58,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:58,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795715777] [2021-06-05 22:04:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:58,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:58,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795715777] [2021-06-05 22:04:58,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795715777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:58,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275472643] [2021-06-05 22:04:58,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:58,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:58,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:58,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:58,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275472643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:58,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:58,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:58,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920059310] [2021-06-05 22:04:58,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:58,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:58,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:58,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:58,755 INFO L87 Difference]: Start difference. First operand 886 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:59,226 INFO L93 Difference]: Finished difference Result 1288 states and 4031 transitions. [2021-06-05 22:04:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:04:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:59,228 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 22:04:59,228 INFO L226 Difference]: Without dead ends: 1281 [2021-06-05 22:04:59,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:04:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-05 22:04:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 894. [2021-06-05 22:04:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.4300111982082866) internal successors, (3063), 893 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3063 transitions. [2021-06-05 22:04:59,239 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3063 transitions. Word has length 20 [2021-06-05 22:04:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:59,239 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3063 transitions. [2021-06-05 22:04:59,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3063 transitions. [2021-06-05 22:04:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:59,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:59,240 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:59,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3875,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:59,441 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash -793103700, now seen corresponding path program 285 times [2021-06-05 22:04:59,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:59,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457406497] [2021-06-05 22:04:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:59,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457406497] [2021-06-05 22:04:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457406497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796720178] [2021-06-05 22:04:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:59,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:04:59,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:04:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:59,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796720178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:59,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:59,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:04:59,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359200051] [2021-06-05 22:04:59,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:04:59,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:04:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:04:59,745 INFO L87 Difference]: Start difference. First operand 894 states and 3063 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:00,459 INFO L93 Difference]: Finished difference Result 1340 states and 4181 transitions. [2021-06-05 22:05:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:05:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:00,461 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 22:05:00,461 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 22:05:00,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 666.6ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:05:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 22:05:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 898. [2021-06-05 22:05:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4370122630992195) internal successors, (3083), 897 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3083 transitions. [2021-06-05 22:05:00,472 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3083 transitions. Word has length 20 [2021-06-05 22:05:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:00,472 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3083 transitions. [2021-06-05 22:05:00,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3083 transitions. [2021-06-05 22:05:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:00,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:00,473 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:00,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:00,674 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:00,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2007955874, now seen corresponding path program 286 times [2021-06-05 22:05:00,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:00,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409394] [2021-06-05 22:05:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:00,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409394] [2021-06-05 22:05:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380625689] [2021-06-05 22:05:00,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:00,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:00,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:00,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380625689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:00,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:00,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505923492] [2021-06-05 22:05:00,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:00,949 INFO L87 Difference]: Start difference. First operand 898 states and 3083 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,729 INFO L93 Difference]: Finished difference Result 1332 states and 4147 transitions. [2021-06-05 22:05:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:05:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,731 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 22:05:01,731 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 22:05:01,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:05:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 22:05:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 904. [2021-06-05 22:05:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.425249169435216) internal successors, (3093), 903 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3093 transitions. [2021-06-05 22:05:01,742 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3093 transitions. Word has length 20 [2021-06-05 22:05:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,742 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 3093 transitions. [2021-06-05 22:05:01,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3093 transitions. [2021-06-05 22:05:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:01,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,743 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-06-05 22:05:01,944 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,944 INFO L82 PathProgramCache]: Analyzing trace with hash 567013040, now seen corresponding path program 287 times [2021-06-05 22:05:01,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546977378] [2021-06-05 22:05:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:02,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:02,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546977378] [2021-06-05 22:05:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546977378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:02,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984143889] [2021-06-05 22:05:02,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:02,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:02,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:02,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:02,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984143889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:02,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:02,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:02,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514775763] [2021-06-05 22:05:02,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:02,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:02,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:02,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:02,271 INFO L87 Difference]: Start difference. First operand 904 states and 3093 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:02,767 INFO L93 Difference]: Finished difference Result 1236 states and 3915 transitions. [2021-06-05 22:05:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:02,768 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 22:05:02,769 INFO L226 Difference]: Without dead ends: 1236 [2021-06-05 22:05:02,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-06-05 22:05:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 898. [2021-06-05 22:05:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.423634336677815) internal successors, (3071), 897 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3071 transitions. [2021-06-05 22:05:02,787 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3071 transitions. Word has length 20 [2021-06-05 22:05:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:02,787 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3071 transitions. [2021-06-05 22:05:02,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3071 transitions. [2021-06-05 22:05:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:02,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:02,788 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:02,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3902,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:02,988 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash 822314614, now seen corresponding path program 288 times [2021-06-05 22:05:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:02,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459835410] [2021-06-05 22:05:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:03,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:03,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459835410] [2021-06-05 22:05:03,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459835410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:03,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31484358] [2021-06-05 22:05:03,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:03,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:03,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:03,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31484358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:03,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:03,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:03,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665274838] [2021-06-05 22:05:03,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:03,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:03,285 INFO L87 Difference]: Start difference. First operand 898 states and 3071 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:03,763 INFO L93 Difference]: Finished difference Result 1208 states and 3845 transitions. [2021-06-05 22:05:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:03,765 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 22:05:03,765 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 22:05:03,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 22:05:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 902. [2021-06-05 22:05:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4239733629300777) internal successors, (3085), 901 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3085 transitions. [2021-06-05 22:05:03,780 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3085 transitions. Word has length 20 [2021-06-05 22:05:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:03,780 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3085 transitions. [2021-06-05 22:05:03,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3085 transitions. [2021-06-05 22:05:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:03,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:03,781 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:03,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3910 [2021-06-05 22:05:03,981 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:03,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1104749858, now seen corresponding path program 289 times [2021-06-05 22:05:03,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:03,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011736395] [2021-06-05 22:05:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:04,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:04,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011736395] [2021-06-05 22:05:04,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011736395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:04,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93441571] [2021-06-05 22:05:04,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:04,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93441571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:04,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:04,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:04,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035242565] [2021-06-05 22:05:04,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:04,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:04,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:04,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:04,299 INFO L87 Difference]: Start difference. First operand 902 states and 3085 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:04,891 INFO L93 Difference]: Finished difference Result 1154 states and 3724 transitions. [2021-06-05 22:05:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:04,892 INFO L225 Difference]: With dead ends: 1154 [2021-06-05 22:05:04,892 INFO L226 Difference]: Without dead ends: 1154 [2021-06-05 22:05:04,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-05 22:05:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 900. [2021-06-05 22:05:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.4260289210233594) internal successors, (3080), 899 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3080 transitions. [2021-06-05 22:05:04,903 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3080 transitions. Word has length 20 [2021-06-05 22:05:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:04,903 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3080 transitions. [2021-06-05 22:05:04,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3080 transitions. [2021-06-05 22:05:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:04,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:04,904 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:05,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-06-05 22:05:05,105 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash -41703262, now seen corresponding path program 290 times [2021-06-05 22:05:05,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:05,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116517932] [2021-06-05 22:05:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:05,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116517932] [2021-06-05 22:05:05,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116517932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391189579] [2021-06-05 22:05:05,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:05,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:05,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:05,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:05,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:05,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391189579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:05,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:05,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208160461] [2021-06-05 22:05:05,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:05,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:05,402 INFO L87 Difference]: Start difference. First operand 900 states and 3080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:06,152 INFO L93 Difference]: Finished difference Result 1167 states and 3761 transitions. [2021-06-05 22:05:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:06,154 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 22:05:06,154 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 22:05:06,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 22:05:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 891. [2021-06-05 22:05:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4303370786516854) internal successors, (3053), 890 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3053 transitions. [2021-06-05 22:05:06,164 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3053 transitions. Word has length 20 [2021-06-05 22:05:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:06,164 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3053 transitions. [2021-06-05 22:05:06,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3053 transitions. [2021-06-05 22:05:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:06,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:06,165 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:06,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-06-05 22:05:06,366 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1250639138, now seen corresponding path program 291 times [2021-06-05 22:05:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:06,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755084831] [2021-06-05 22:05:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:06,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:06,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755084831] [2021-06-05 22:05:06,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755084831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:06,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495537120] [2021-06-05 22:05:06,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:06,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:06,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:06,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495537120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:06,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:06,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:06,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620256475] [2021-06-05 22:05:06,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:06,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:06,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:06,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:06,686 INFO L87 Difference]: Start difference. First operand 891 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:07,386 INFO L93 Difference]: Finished difference Result 1153 states and 3724 transitions. [2021-06-05 22:05:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:07,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:07,388 INFO L225 Difference]: With dead ends: 1153 [2021-06-05 22:05:07,388 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 22:05:07,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 650.7ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 22:05:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 890. [2021-06-05 22:05:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4274465691788527) internal successors, (3047), 889 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3047 transitions. [2021-06-05 22:05:07,399 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3047 transitions. Word has length 20 [2021-06-05 22:05:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:07,399 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3047 transitions. [2021-06-05 22:05:07,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3047 transitions. [2021-06-05 22:05:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:07,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:07,400 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:07,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3934 [2021-06-05 22:05:07,600 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash -20966734, now seen corresponding path program 292 times [2021-06-05 22:05:07,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:07,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743276212] [2021-06-05 22:05:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:07,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:07,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743276212] [2021-06-05 22:05:07,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743276212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:07,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466444617] [2021-06-05 22:05:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:07,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:07,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466444617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:07,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:07,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:07,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308894656] [2021-06-05 22:05:07,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:07,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:07,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:07,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:07,886 INFO L87 Difference]: Start difference. First operand 890 states and 3047 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:08,699 INFO L93 Difference]: Finished difference Result 1254 states and 3951 transitions. [2021-06-05 22:05:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:05:08,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:08,701 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 22:05:08,701 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 22:05:08,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 731.3ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 22:05:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 900. [2021-06-05 22:05:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.4193548387096775) internal successors, (3074), 899 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3074 transitions. [2021-06-05 22:05:08,712 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3074 transitions. Word has length 20 [2021-06-05 22:05:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:08,712 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3074 transitions. [2021-06-05 22:05:08,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3074 transitions. [2021-06-05 22:05:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:08,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:08,713 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:08,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3941,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:08,914 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:08,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1936390660, now seen corresponding path program 293 times [2021-06-05 22:05:08,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:08,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938352515] [2021-06-05 22:05:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:08,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938352515] [2021-06-05 22:05:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938352515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047546097] [2021-06-05 22:05:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:09,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:09,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:09,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047546097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:09,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:09,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:09,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948955548] [2021-06-05 22:05:09,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:09,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:09,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:09,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:09,273 INFO L87 Difference]: Start difference. First operand 900 states and 3074 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:10,106 INFO L93 Difference]: Finished difference Result 1159 states and 3739 transitions. [2021-06-05 22:05:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:10,108 INFO L225 Difference]: With dead ends: 1159 [2021-06-05 22:05:10,108 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 22:05:10,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 814.0ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:05:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 22:05:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 890. [2021-06-05 22:05:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4274465691788527) internal successors, (3047), 889 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3047 transitions. [2021-06-05 22:05:10,118 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3047 transitions. Word has length 20 [2021-06-05 22:05:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:10,118 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3047 transitions. [2021-06-05 22:05:10,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3047 transitions. [2021-06-05 22:05:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:10,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:10,119 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:10,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-06-05 22:05:10,320 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash 474627614, now seen corresponding path program 294 times [2021-06-05 22:05:10,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:10,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981550486] [2021-06-05 22:05:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:10,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:10,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981550486] [2021-06-05 22:05:10,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981550486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:10,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603433411] [2021-06-05 22:05:10,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:10,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:10,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:10,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603433411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:10,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:10,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:10,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527577660] [2021-06-05 22:05:10,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:10,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:10,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:10,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:10,596 INFO L87 Difference]: Start difference. First operand 890 states and 3047 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:11,050 INFO L93 Difference]: Finished difference Result 1176 states and 3789 transitions. [2021-06-05 22:05:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:11,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:11,051 INFO L225 Difference]: With dead ends: 1176 [2021-06-05 22:05:11,051 INFO L226 Difference]: Without dead ends: 1176 [2021-06-05 22:05:11,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-05 22:05:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 893. [2021-06-05 22:05:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4327354260089686) internal successors, (3062), 892 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3062 transitions. [2021-06-05 22:05:11,062 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3062 transitions. Word has length 20 [2021-06-05 22:05:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:11,062 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3062 transitions. [2021-06-05 22:05:11,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3062 transitions. [2021-06-05 22:05:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:11,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:11,063 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:11,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3969,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:11,263 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2098965382, now seen corresponding path program 295 times [2021-06-05 22:05:11,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:11,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879808317] [2021-06-05 22:05:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:11,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:11,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879808317] [2021-06-05 22:05:11,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879808317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:11,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305610582] [2021-06-05 22:05:11,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:11,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305610582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:11,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:11,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438028646] [2021-06-05 22:05:11,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:11,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:11,564 INFO L87 Difference]: Start difference. First operand 893 states and 3062 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:12,044 INFO L93 Difference]: Finished difference Result 1140 states and 3709 transitions. [2021-06-05 22:05:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:12,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:12,045 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 22:05:12,045 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 22:05:12,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 22:05:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 889. [2021-06-05 22:05:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4245495495495497) internal successors, (3041), 888 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3041 transitions. [2021-06-05 22:05:12,055 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3041 transitions. Word has length 20 [2021-06-05 22:05:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:12,055 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3041 transitions. [2021-06-05 22:05:12,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3041 transitions. [2021-06-05 22:05:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:12,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:12,057 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:12,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-06-05 22:05:12,257 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2039824350, now seen corresponding path program 296 times [2021-06-05 22:05:12,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:12,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760210358] [2021-06-05 22:05:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:12,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:12,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760210358] [2021-06-05 22:05:12,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760210358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:12,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2979358] [2021-06-05 22:05:12,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:12,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:12,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:12,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:12,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2979358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:12,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:12,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:12,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548339376] [2021-06-05 22:05:12,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:12,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:12,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:12,629 INFO L87 Difference]: Start difference. First operand 889 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:13,348 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 22:05:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:13,507 INFO L93 Difference]: Finished difference Result 1129 states and 3651 transitions. [2021-06-05 22:05:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:05:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:13,509 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 22:05:13,509 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 22:05:13,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 910.1ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 22:05:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 891. [2021-06-05 22:05:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4247191011235953) internal successors, (3048), 890 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3048 transitions. [2021-06-05 22:05:13,519 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3048 transitions. Word has length 20 [2021-06-05 22:05:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:13,519 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3048 transitions. [2021-06-05 22:05:13,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3048 transitions. [2021-06-05 22:05:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:13,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:13,520 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:13,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:13,720 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1288423912, now seen corresponding path program 297 times [2021-06-05 22:05:13,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:13,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194442774] [2021-06-05 22:05:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:13,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:13,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194442774] [2021-06-05 22:05:13,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194442774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:13,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530515213] [2021-06-05 22:05:13,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:13,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:13,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:13,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:14,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530515213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:14,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:14,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:14,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165051183] [2021-06-05 22:05:14,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:14,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:14,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:14,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:14,027 INFO L87 Difference]: Start difference. First operand 891 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:14,799 INFO L93 Difference]: Finished difference Result 1154 states and 3703 transitions. [2021-06-05 22:05:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:05:14,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:14,801 INFO L225 Difference]: With dead ends: 1154 [2021-06-05 22:05:14,801 INFO L226 Difference]: Without dead ends: 1148 [2021-06-05 22:05:14,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 758.3ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-06-05 22:05:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 901. [2021-06-05 22:05:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4166666666666665) internal successors, (3075), 900 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3075 transitions. [2021-06-05 22:05:14,812 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3075 transitions. Word has length 20 [2021-06-05 22:05:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:14,812 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 3075 transitions. [2021-06-05 22:05:14,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3075 transitions. [2021-06-05 22:05:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:14,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:14,813 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:15,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:15,013 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:15,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1091119458, now seen corresponding path program 298 times [2021-06-05 22:05:15,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:15,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199750005] [2021-06-05 22:05:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:15,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:15,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199750005] [2021-06-05 22:05:15,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199750005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:15,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935798691] [2021-06-05 22:05:15,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:15,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:15,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:15,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:15,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935798691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:15,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:15,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:15,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930341959] [2021-06-05 22:05:15,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:15,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:15,342 INFO L87 Difference]: Start difference. First operand 901 states and 3075 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:16,042 INFO L93 Difference]: Finished difference Result 1047 states and 3461 transitions. [2021-06-05 22:05:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:16,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:16,044 INFO L225 Difference]: With dead ends: 1047 [2021-06-05 22:05:16,044 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 22:05:16,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:05:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 22:05:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 891. [2021-06-05 22:05:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4247191011235953) internal successors, (3048), 890 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3048 transitions. [2021-06-05 22:05:16,054 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3048 transitions. Word has length 20 [2021-06-05 22:05:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:16,054 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3048 transitions. [2021-06-05 22:05:16,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3048 transitions. [2021-06-05 22:05:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:16,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:16,055 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:16,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-05 22:05:16,255 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1966715728, now seen corresponding path program 299 times [2021-06-05 22:05:16,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:16,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875466688] [2021-06-05 22:05:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:16,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875466688] [2021-06-05 22:05:16,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875466688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000978673] [2021-06-05 22:05:16,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:16,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000978673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:16,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:16,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970456902] [2021-06-05 22:05:16,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:16,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:16,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:16,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:16,552 INFO L87 Difference]: Start difference. First operand 891 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:16,944 INFO L93 Difference]: Finished difference Result 1089 states and 3574 transitions. [2021-06-05 22:05:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:16,945 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 22:05:16,945 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 22:05:16,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 22:05:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 890. [2021-06-05 22:05:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4263217097862766) internal successors, (3046), 889 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3046 transitions. [2021-06-05 22:05:16,955 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3046 transitions. Word has length 20 [2021-06-05 22:05:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:16,956 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3046 transitions. [2021-06-05 22:05:16,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3046 transitions. [2021-06-05 22:05:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:16,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:16,957 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:17,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:17,157 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:17,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:17,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1215315290, now seen corresponding path program 300 times [2021-06-05 22:05:17,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:17,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307197804] [2021-06-05 22:05:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:17,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307197804] [2021-06-05 22:05:17,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307197804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134722168] [2021-06-05 22:05:17,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:17,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:17,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:17,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:17,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:17,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134722168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:17,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:17,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:17,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280336873] [2021-06-05 22:05:17,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:17,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:17,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:17,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:17,438 INFO L87 Difference]: Start difference. First operand 890 states and 3046 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:17,901 INFO L93 Difference]: Finished difference Result 1109 states and 3613 transitions. [2021-06-05 22:05:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:17,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:17,903 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 22:05:17,903 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 22:05:17,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 22:05:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 889. [2021-06-05 22:05:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4245495495495497) internal successors, (3041), 888 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3041 transitions. [2021-06-05 22:05:17,913 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3041 transitions. Word has length 20 [2021-06-05 22:05:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:17,913 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3041 transitions. [2021-06-05 22:05:17,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3041 transitions. [2021-06-05 22:05:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:17,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:17,914 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:18,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-05 22:05:18,114 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:18,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:18,114 INFO L82 PathProgramCache]: Analyzing trace with hash 409022478, now seen corresponding path program 301 times [2021-06-05 22:05:18,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:18,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066695562] [2021-06-05 22:05:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:18,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:18,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066695562] [2021-06-05 22:05:18,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066695562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747854511] [2021-06-05 22:05:18,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:18,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747854511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:18,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:18,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115086001] [2021-06-05 22:05:18,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:18,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:18,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:18,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:18,399 INFO L87 Difference]: Start difference. First operand 889 states and 3041 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:18,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:18,868 INFO L93 Difference]: Finished difference Result 1067 states and 3518 transitions. [2021-06-05 22:05:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:18,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:18,870 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 22:05:18,870 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 22:05:18,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 22:05:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 875. [2021-06-05 22:05:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4244851258581237) internal successors, (2993), 874 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2993 transitions. [2021-06-05 22:05:18,879 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2993 transitions. Word has length 20 [2021-06-05 22:05:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:18,879 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2993 transitions. [2021-06-05 22:05:18,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2993 transitions. [2021-06-05 22:05:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:18,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:18,880 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:19,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:19,081 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash 174967158, now seen corresponding path program 302 times [2021-06-05 22:05:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:19,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825138730] [2021-06-05 22:05:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:19,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:19,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825138730] [2021-06-05 22:05:19,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825138730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:19,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464319612] [2021-06-05 22:05:19,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:19,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:19,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:19,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:19,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464319612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:19,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:19,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:19,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098378879] [2021-06-05 22:05:19,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:19,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:19,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:19,312 INFO L87 Difference]: Start difference. First operand 875 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:19,577 INFO L93 Difference]: Finished difference Result 1056 states and 3460 transitions. [2021-06-05 22:05:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:19,578 INFO L225 Difference]: With dead ends: 1056 [2021-06-05 22:05:19,578 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 22:05:19,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 22:05:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 875. [2021-06-05 22:05:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4244851258581237) internal successors, (2993), 874 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2993 transitions. [2021-06-05 22:05:19,588 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2993 transitions. Word has length 20 [2021-06-05 22:05:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:19,588 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2993 transitions. [2021-06-05 22:05:19,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2993 transitions. [2021-06-05 22:05:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:19,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:19,589 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:19,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-05 22:05:19,789 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:19,789 INFO L82 PathProgramCache]: Analyzing trace with hash 262399376, now seen corresponding path program 303 times [2021-06-05 22:05:19,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:19,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741153001] [2021-06-05 22:05:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:19,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:19,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741153001] [2021-06-05 22:05:19,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741153001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:19,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487012907] [2021-06-05 22:05:19,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:19,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:19,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:19,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:19,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:20,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487012907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:20,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:20,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:20,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7894441] [2021-06-05 22:05:20,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:20,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:20,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:20,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:20,028 INFO L87 Difference]: Start difference. First operand 875 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:20,501 INFO L93 Difference]: Finished difference Result 1164 states and 3708 transitions. [2021-06-05 22:05:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:20,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:20,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:20,502 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 22:05:20,503 INFO L226 Difference]: Without dead ends: 1157 [2021-06-05 22:05:20,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-06-05 22:05:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 888. [2021-06-05 22:05:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-05 22:05:20,513 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-05 22:05:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:20,513 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-05 22:05:20,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-05 22:05:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:20,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:20,514 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:20,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:20,714 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:20,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1971203602, now seen corresponding path program 304 times [2021-06-05 22:05:20,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:20,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15511645] [2021-06-05 22:05:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:20,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:20,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15511645] [2021-06-05 22:05:20,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15511645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:20,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936846225] [2021-06-05 22:05:20,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:20,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:20,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:20,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936846225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:20,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:20,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:20,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860204887] [2021-06-05 22:05:20,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:20,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:20,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:20,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:20,958 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:21,301 INFO L93 Difference]: Finished difference Result 1111 states and 3595 transitions. [2021-06-05 22:05:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:21,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:21,302 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 22:05:21,302 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:05:21,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:05:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 888. [2021-06-05 22:05:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-05 22:05:21,312 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-05 22:05:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:21,312 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-05 22:05:21,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-05 22:05:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:21,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:21,313 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:21,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-05 22:05:21,514 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash 262903892, now seen corresponding path program 305 times [2021-06-05 22:05:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:21,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330412432] [2021-06-05 22:05:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:21,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330412432] [2021-06-05 22:05:21,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330412432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901599138] [2021-06-05 22:05:21,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:21,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:21,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:21,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:21,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:21,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901599138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:21,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207253672] [2021-06-05 22:05:21,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:21,747 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:22,000 INFO L93 Difference]: Finished difference Result 1075 states and 3507 transitions. [2021-06-05 22:05:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:22,000 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:22,001 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 22:05:22,001 INFO L226 Difference]: Without dead ends: 1069 [2021-06-05 22:05:22,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-05 22:05:22,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 888. [2021-06-05 22:05:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.416009019165727) internal successors, (3030), 887 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3030 transitions. [2021-06-05 22:05:22,011 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3030 transitions. Word has length 20 [2021-06-05 22:05:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:22,011 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3030 transitions. [2021-06-05 22:05:22,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3030 transitions. [2021-06-05 22:05:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:22,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:22,012 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:22,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-06-05 22:05:22,213 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1178038942, now seen corresponding path program 306 times [2021-06-05 22:05:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:22,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717604791] [2021-06-05 22:05:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:22,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:22,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717604791] [2021-06-05 22:05:22,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717604791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971503061] [2021-06-05 22:05:22,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:22,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:22,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:22,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:22,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:22,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971503061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:22,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:22,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053676250] [2021-06-05 22:05:22,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:22,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:22,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:22,464 INFO L87 Difference]: Start difference. First operand 888 states and 3030 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:22,809 INFO L93 Difference]: Finished difference Result 1121 states and 3616 transitions. [2021-06-05 22:05:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:22,810 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 22:05:22,811 INFO L226 Difference]: Without dead ends: 1121 [2021-06-05 22:05:22,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-05 22:05:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 872. [2021-06-05 22:05:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4270952927669347) internal successors, (2985), 871 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2985 transitions. [2021-06-05 22:05:22,820 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2985 transitions. Word has length 20 [2021-06-05 22:05:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:22,820 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2985 transitions. [2021-06-05 22:05:22,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2985 transitions. [2021-06-05 22:05:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:22,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:22,821 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:23,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:23,022 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:23,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1844384744, now seen corresponding path program 307 times [2021-06-05 22:05:23,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:23,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922475569] [2021-06-05 22:05:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:23,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:23,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922475569] [2021-06-05 22:05:23,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922475569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087233610] [2021-06-05 22:05:23,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:23,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:23,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087233610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:23,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641820148] [2021-06-05 22:05:23,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:23,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:23,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:23,252 INFO L87 Difference]: Start difference. First operand 872 states and 2985 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:23,649 INFO L93 Difference]: Finished difference Result 1217 states and 3835 transitions. [2021-06-05 22:05:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:23,651 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 22:05:23,651 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 22:05:23,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 22:05:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 888. [2021-06-05 22:05:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.422773393461105) internal successors, (3036), 887 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3036 transitions. [2021-06-05 22:05:23,661 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3036 transitions. Word has length 20 [2021-06-05 22:05:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:23,661 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3036 transitions. [2021-06-05 22:05:23,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3036 transitions. [2021-06-05 22:05:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:23,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:23,662 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:23,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4045,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:23,863 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:23,863 INFO L82 PathProgramCache]: Analyzing trace with hash 216979574, now seen corresponding path program 308 times [2021-06-05 22:05:23,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:23,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211105974] [2021-06-05 22:05:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:23,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:23,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211105974] [2021-06-05 22:05:23,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211105974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481452076] [2021-06-05 22:05:23,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:24,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:24,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481452076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:24,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:24,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345088551] [2021-06-05 22:05:24,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:24,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:24,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:24,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:24,109 INFO L87 Difference]: Start difference. First operand 888 states and 3036 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:24,400 INFO L93 Difference]: Finished difference Result 1088 states and 3535 transitions. [2021-06-05 22:05:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:24,402 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 22:05:24,402 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 22:05:24,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 22:05:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 888. [2021-06-05 22:05:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.422773393461105) internal successors, (3036), 887 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3036 transitions. [2021-06-05 22:05:24,417 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3036 transitions. Word has length 20 [2021-06-05 22:05:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:24,417 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3036 transitions. [2021-06-05 22:05:24,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3036 transitions. [2021-06-05 22:05:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:24,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:24,418 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:24,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-06-05 22:05:24,619 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1843880228, now seen corresponding path program 309 times [2021-06-05 22:05:24,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:24,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472861574] [2021-06-05 22:05:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:24,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472861574] [2021-06-05 22:05:24,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472861574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027919006] [2021-06-05 22:05:24,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:24,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:24,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027919006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:24,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:24,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391606308] [2021-06-05 22:05:24,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:24,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:24,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:24,860 INFO L87 Difference]: Start difference. First operand 888 states and 3036 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:25,200 INFO L93 Difference]: Finished difference Result 1065 states and 3484 transitions. [2021-06-05 22:05:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:25,201 INFO L225 Difference]: With dead ends: 1065 [2021-06-05 22:05:25,201 INFO L226 Difference]: Without dead ends: 1059 [2021-06-05 22:05:25,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-06-05 22:05:25,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 888. [2021-06-05 22:05:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-05 22:05:25,211 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-05 22:05:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:25,211 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-05 22:05:25,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-05 22:05:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:25,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:25,212 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:25,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-05 22:05:25,412 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1010144234, now seen corresponding path program 310 times [2021-06-05 22:05:25,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:25,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801112875] [2021-06-05 22:05:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:25,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:25,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801112875] [2021-06-05 22:05:25,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801112875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:25,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910055950] [2021-06-05 22:05:25,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:25,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:25,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:25,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:25,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910055950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:25,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:25,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:25,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740691291] [2021-06-05 22:05:25,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:25,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:25,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:25,642 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:26,082 INFO L93 Difference]: Finished difference Result 1174 states and 3755 transitions. [2021-06-05 22:05:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:05:26,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:26,084 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 22:05:26,084 INFO L226 Difference]: Without dead ends: 1174 [2021-06-05 22:05:26,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:26,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-05 22:05:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 885. [2021-06-05 22:05:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.421945701357466) internal successors, (3025), 884 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3025 transitions. [2021-06-05 22:05:26,094 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3025 transitions. Word has length 20 [2021-06-05 22:05:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:26,094 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3025 transitions. [2021-06-05 22:05:26,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3025 transitions. [2021-06-05 22:05:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:26,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:26,095 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:26,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-06-05 22:05:26,296 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:26,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1136026526, now seen corresponding path program 311 times [2021-06-05 22:05:26,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:26,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687677271] [2021-06-05 22:05:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687677271] [2021-06-05 22:05:26,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687677271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821336401] [2021-06-05 22:05:26,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:26,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:26,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821336401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:26,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:26,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209361821] [2021-06-05 22:05:26,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:26,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:26,520 INFO L87 Difference]: Start difference. First operand 885 states and 3025 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:26,853 INFO L93 Difference]: Finished difference Result 1133 states and 3648 transitions. [2021-06-05 22:05:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:26,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:26,855 INFO L225 Difference]: With dead ends: 1133 [2021-06-05 22:05:26,855 INFO L226 Difference]: Without dead ends: 1133 [2021-06-05 22:05:26,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-05 22:05:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 866. [2021-06-05 22:05:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.432369942196532) internal successors, (2969), 865 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2969 transitions. [2021-06-05 22:05:26,865 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2969 transitions. Word has length 20 [2021-06-05 22:05:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:26,865 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2969 transitions. [2021-06-05 22:05:26,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2969 transitions. [2021-06-05 22:05:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:26,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:26,866 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:27,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-05 22:05:27,067 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1678669926, now seen corresponding path program 312 times [2021-06-05 22:05:27,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:27,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656495926] [2021-06-05 22:05:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:27,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656495926] [2021-06-05 22:05:27,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656495926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103463175] [2021-06-05 22:05:27,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:27,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103463175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:27,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:27,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213368290] [2021-06-05 22:05:27,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:27,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:27,331 INFO L87 Difference]: Start difference. First operand 866 states and 2969 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:27,694 INFO L93 Difference]: Finished difference Result 1166 states and 3748 transitions. [2021-06-05 22:05:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:27,695 INFO L225 Difference]: With dead ends: 1166 [2021-06-05 22:05:27,695 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 22:05:27,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 22:05:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 875. [2021-06-05 22:05:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4347826086956523) internal successors, (3002), 874 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3002 transitions. [2021-06-05 22:05:27,705 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3002 transitions. Word has length 20 [2021-06-05 22:05:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:27,705 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 3002 transitions. [2021-06-05 22:05:27,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3002 transitions. [2021-06-05 22:05:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:27,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:27,707 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:27,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-05 22:05:27,907 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:27,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1122389648, now seen corresponding path program 313 times [2021-06-05 22:05:27,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:27,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225657627] [2021-06-05 22:05:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:27,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225657627] [2021-06-05 22:05:27,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225657627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075354312] [2021-06-05 22:05:27,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:28,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075354312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:28,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:28,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536808774] [2021-06-05 22:05:28,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:28,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:28,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:28,161 INFO L87 Difference]: Start difference. First operand 875 states and 3002 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:28,634 INFO L93 Difference]: Finished difference Result 1172 states and 3755 transitions. [2021-06-05 22:05:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:28,636 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 22:05:28,636 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 22:05:28,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 22:05:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 872. [2021-06-05 22:05:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4339839265212397) internal successors, (2991), 871 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2991 transitions. [2021-06-05 22:05:28,646 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2991 transitions. Word has length 20 [2021-06-05 22:05:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:28,646 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2991 transitions. [2021-06-05 22:05:28,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2991 transitions. [2021-06-05 22:05:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:28,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:28,647 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:28,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4076,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:28,848 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1660245226, now seen corresponding path program 314 times [2021-06-05 22:05:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:28,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417469879] [2021-06-05 22:05:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:28,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:28,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417469879] [2021-06-05 22:05:28,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417469879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493168006] [2021-06-05 22:05:28,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:28,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:28,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:29,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:29,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493168006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:29,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:05:29,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344715645] [2021-06-05 22:05:29,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:29,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:29,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:29,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:29,123 INFO L87 Difference]: Start difference. First operand 872 states and 2991 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:29,504 INFO L93 Difference]: Finished difference Result 1136 states and 3673 transitions. [2021-06-05 22:05:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:29,506 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:05:29,506 INFO L226 Difference]: Without dead ends: 1124 [2021-06-05 22:05:29,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-06-05 22:05:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 869. [2021-06-05 22:05:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.4331797235023043) internal successors, (2980), 868 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2980 transitions. [2021-06-05 22:05:29,523 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2980 transitions. Word has length 20 [2021-06-05 22:05:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:29,523 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2980 transitions. [2021-06-05 22:05:29,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2980 transitions. [2021-06-05 22:05:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:29,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:29,524 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:29,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-06-05 22:05:29,725 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:29,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2046976748, now seen corresponding path program 315 times [2021-06-05 22:05:29,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:29,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483225178] [2021-06-05 22:05:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:29,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483225178] [2021-06-05 22:05:29,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483225178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073918026] [2021-06-05 22:05:29,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:29,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:29,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:29,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:29,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073918026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:29,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:05:29,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741958363] [2021-06-05 22:05:29,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:29,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:29,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:29,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:29,952 INFO L87 Difference]: Start difference. First operand 869 states and 2980 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:30,286 INFO L93 Difference]: Finished difference Result 1127 states and 3649 transitions. [2021-06-05 22:05:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:30,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:30,287 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 22:05:30,287 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 22:05:30,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 22:05:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 863. [2021-06-05 22:05:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4350348027842226) internal successors, (2961), 862 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2961 transitions. [2021-06-05 22:05:30,297 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2961 transitions. Word has length 20 [2021-06-05 22:05:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:30,297 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2961 transitions. [2021-06-05 22:05:30,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2961 transitions. [2021-06-05 22:05:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:30,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:30,298 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:30,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4086,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:30,499 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1189722200, now seen corresponding path program 316 times [2021-06-05 22:05:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:30,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869398009] [2021-06-05 22:05:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:30,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:30,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869398009] [2021-06-05 22:05:30,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869398009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:30,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343358766] [2021-06-05 22:05:30,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:30,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:30,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:30,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:30,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:30,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343358766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:30,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:30,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:30,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389586740] [2021-06-05 22:05:30,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:30,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:30,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:30,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:30,751 INFO L87 Difference]: Start difference. First operand 863 states and 2961 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:31,155 INFO L93 Difference]: Finished difference Result 1078 states and 3489 transitions. [2021-06-05 22:05:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:31,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:31,157 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 22:05:31,157 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 22:05:31,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 22:05:31,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 863. [2021-06-05 22:05:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4315545243619487) internal successors, (2958), 862 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2958 transitions. [2021-06-05 22:05:31,167 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2958 transitions. Word has length 20 [2021-06-05 22:05:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:31,167 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2958 transitions. [2021-06-05 22:05:31,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2958 transitions. [2021-06-05 22:05:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:31,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:31,168 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:31,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-06-05 22:05:31,368 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1313897980, now seen corresponding path program 317 times [2021-06-05 22:05:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:31,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380036903] [2021-06-05 22:05:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:31,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:31,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380036903] [2021-06-05 22:05:31,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380036903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:31,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603520999] [2021-06-05 22:05:31,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:31,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:31,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603520999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:31,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:31,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:31,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126451571] [2021-06-05 22:05:31,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:31,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:31,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:31,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:31,620 INFO L87 Difference]: Start difference. First operand 863 states and 2958 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:31,945 INFO L93 Difference]: Finished difference Result 1029 states and 3380 transitions. [2021-06-05 22:05:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:31,947 INFO L225 Difference]: With dead ends: 1029 [2021-06-05 22:05:31,947 INFO L226 Difference]: Without dead ends: 1029 [2021-06-05 22:05:31,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 328.3ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-05 22:05:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 860. [2021-06-05 22:05:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.430733410942957) internal successors, (2947), 859 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2947 transitions. [2021-06-05 22:05:31,956 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2947 transitions. Word has length 20 [2021-06-05 22:05:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:31,956 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2947 transitions. [2021-06-05 22:05:31,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2947 transitions. [2021-06-05 22:05:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:31,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:31,957 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:32,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-05 22:05:32,158 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash -832272780, now seen corresponding path program 318 times [2021-06-05 22:05:32,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:32,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550445569] [2021-06-05 22:05:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:32,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:32,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550445569] [2021-06-05 22:05:32,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550445569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:32,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420040429] [2021-06-05 22:05:32,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:32,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:32,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:32,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:32,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:32,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420040429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:32,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:32,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:32,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620168270] [2021-06-05 22:05:32,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:32,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:32,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:32,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:32,420 INFO L87 Difference]: Start difference. First operand 860 states and 2947 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:32,893 INFO L93 Difference]: Finished difference Result 1090 states and 3531 transitions. [2021-06-05 22:05:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:05:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:32,894 INFO L225 Difference]: With dead ends: 1090 [2021-06-05 22:05:32,894 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 22:05:32,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 22:05:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 857. [2021-06-05 22:05:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.433411214953271) internal successors, (2939), 856 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2939 transitions. [2021-06-05 22:05:32,905 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2939 transitions. Word has length 20 [2021-06-05 22:05:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:32,905 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2939 transitions. [2021-06-05 22:05:32,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2939 transitions. [2021-06-05 22:05:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:32,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:32,906 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:33,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-05 22:05:33,122 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:33,122 INFO L82 PathProgramCache]: Analyzing trace with hash -39108120, now seen corresponding path program 319 times [2021-06-05 22:05:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:33,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345344115] [2021-06-05 22:05:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:33,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:33,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345344115] [2021-06-05 22:05:33,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345344115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426680845] [2021-06-05 22:05:33,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:33,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:33,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:33,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426680845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:33,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:33,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644854492] [2021-06-05 22:05:33,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:33,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:33,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:33,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:33,381 INFO L87 Difference]: Start difference. First operand 857 states and 2939 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:33,800 INFO L93 Difference]: Finished difference Result 1090 states and 3526 transitions. [2021-06-05 22:05:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:33,801 INFO L225 Difference]: With dead ends: 1090 [2021-06-05 22:05:33,801 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 22:05:33,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 22:05:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 854. [2021-06-05 22:05:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4361078546307153) internal successors, (2931), 853 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2931 transitions. [2021-06-05 22:05:33,811 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2931 transitions. Word has length 20 [2021-06-05 22:05:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:33,811 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2931 transitions. [2021-06-05 22:05:33,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2931 transitions. [2021-06-05 22:05:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:33,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:33,812 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:34,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:34,012 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2145892240, now seen corresponding path program 320 times [2021-06-05 22:05:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:34,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261422078] [2021-06-05 22:05:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:34,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261422078] [2021-06-05 22:05:34,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261422078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137854772] [2021-06-05 22:05:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:34,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:34,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137854772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:34,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:34,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060369253] [2021-06-05 22:05:34,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:34,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:34,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:34,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:34,263 INFO L87 Difference]: Start difference. First operand 854 states and 2931 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:34,996 INFO L93 Difference]: Finished difference Result 1223 states and 3849 transitions. [2021-06-05 22:05:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:05:34,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:34,997 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 22:05:34,998 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 22:05:34,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 659.1ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:05:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 22:05:35,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 857. [2021-06-05 22:05:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.44392523364486) internal successors, (2948), 856 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2948 transitions. [2021-06-05 22:05:35,008 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2948 transitions. Word has length 20 [2021-06-05 22:05:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:35,009 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2948 transitions. [2021-06-05 22:05:35,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:35,009 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2948 transitions. [2021-06-05 22:05:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:35,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:35,010 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:35,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-06-05 22:05:35,210 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash -167093828, now seen corresponding path program 321 times [2021-06-05 22:05:35,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:35,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633273404] [2021-06-05 22:05:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:35,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:35,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633273404] [2021-06-05 22:05:35,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633273404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989906169] [2021-06-05 22:05:35,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:35,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:35,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:35,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:35,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:35,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989906169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:35,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:35,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539614335] [2021-06-05 22:05:35,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:35,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:35,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:35,481 INFO L87 Difference]: Start difference. First operand 857 states and 2948 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:35,866 INFO L93 Difference]: Finished difference Result 1066 states and 3463 transitions. [2021-06-05 22:05:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:35,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:35,868 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 22:05:35,868 INFO L226 Difference]: Without dead ends: 1054 [2021-06-05 22:05:35,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-06-05 22:05:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 857. [2021-06-05 22:05:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.4404205607476634) internal successors, (2945), 856 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2945 transitions. [2021-06-05 22:05:35,877 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2945 transitions. Word has length 20 [2021-06-05 22:05:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:35,877 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2945 transitions. [2021-06-05 22:05:35,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2945 transitions. [2021-06-05 22:05:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:35,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:35,878 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:36,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4116 [2021-06-05 22:05:36,090 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:36,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:36,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2904296, now seen corresponding path program 322 times [2021-06-05 22:05:36,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:36,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239271198] [2021-06-05 22:05:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:36,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239271198] [2021-06-05 22:05:36,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239271198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890313806] [2021-06-05 22:05:36,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:36,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:36,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:36,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:36,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890313806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:36,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:36,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607221603] [2021-06-05 22:05:36,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:36,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:36,333 INFO L87 Difference]: Start difference. First operand 857 states and 2945 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:36,746 INFO L93 Difference]: Finished difference Result 1099 states and 3547 transitions. [2021-06-05 22:05:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:36,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:36,747 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 22:05:36,747 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 22:05:36,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 22:05:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 845. [2021-06-05 22:05:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-05 22:05:36,757 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-05 22:05:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:36,757 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-05 22:05:36,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-05 22:05:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:36,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:36,758 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:36,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-05 22:05:36,959 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:36,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1566267888, now seen corresponding path program 323 times [2021-06-05 22:05:36,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:36,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027955347] [2021-06-05 22:05:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:37,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:37,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027955347] [2021-06-05 22:05:37,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027955347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:37,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864432200] [2021-06-05 22:05:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:37,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:37,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:37,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864432200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:37,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:37,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:37,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979363634] [2021-06-05 22:05:37,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:37,231 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:37,657 INFO L93 Difference]: Finished difference Result 1061 states and 3467 transitions. [2021-06-05 22:05:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:37,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:37,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:37,659 INFO L225 Difference]: With dead ends: 1061 [2021-06-05 22:05:37,659 INFO L226 Difference]: Without dead ends: 1061 [2021-06-05 22:05:37,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-05 22:05:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 852. [2021-06-05 22:05:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4418331374853115) internal successors, (2929), 851 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2929 transitions. [2021-06-05 22:05:37,669 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2929 transitions. Word has length 20 [2021-06-05 22:05:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:37,669 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2929 transitions. [2021-06-05 22:05:37,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2929 transitions. [2021-06-05 22:05:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:37,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:37,670 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:37,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4122,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:37,870 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash -857909670, now seen corresponding path program 324 times [2021-06-05 22:05:37,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:37,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425987949] [2021-06-05 22:05:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:37,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425987949] [2021-06-05 22:05:37,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425987949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59038262] [2021-06-05 22:05:37,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:38,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:38,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:38,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:38,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59038262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:38,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:38,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:38,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825629230] [2021-06-05 22:05:38,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:38,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:38,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:38,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:38,175 INFO L87 Difference]: Start difference. First operand 852 states and 2929 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:38,762 INFO L93 Difference]: Finished difference Result 1210 states and 3806 transitions. [2021-06-05 22:05:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:05:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:38,763 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 22:05:38,763 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 22:05:38,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 571.0ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 22:05:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 852. [2021-06-05 22:05:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4488836662749707) internal successors, (2935), 851 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2935 transitions. [2021-06-05 22:05:38,774 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2935 transitions. Word has length 20 [2021-06-05 22:05:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:38,774 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2935 transitions. [2021-06-05 22:05:38,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2935 transitions. [2021-06-05 22:05:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:38,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:38,775 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:38,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:38,975 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1267059590, now seen corresponding path program 325 times [2021-06-05 22:05:38,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:38,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632010711] [2021-06-05 22:05:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:39,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:39,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632010711] [2021-06-05 22:05:39,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632010711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40484784] [2021-06-05 22:05:39,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:39,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:39,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40484784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:39,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:39,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875915319] [2021-06-05 22:05:39,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:39,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:39,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:39,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:39,305 INFO L87 Difference]: Start difference. First operand 852 states and 2935 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:39,656 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 22:05:39,840 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-05 22:05:39,978 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 22:05:40,229 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-06-05 22:05:40,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:40,295 INFO L93 Difference]: Finished difference Result 1081 states and 3503 transitions. [2021-06-05 22:05:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:05:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:40,296 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 22:05:40,296 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 22:05:40,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 955.5ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 22:05:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 854. [2021-06-05 22:05:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4490035169988276) internal successors, (2942), 853 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2942 transitions. [2021-06-05 22:05:40,306 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2942 transitions. Word has length 20 [2021-06-05 22:05:40,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:40,306 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2942 transitions. [2021-06-05 22:05:40,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,306 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2942 transitions. [2021-06-05 22:05:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:40,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:40,307 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:40,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:40,507 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:40,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1657603102, now seen corresponding path program 326 times [2021-06-05 22:05:40,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:40,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964985863] [2021-06-05 22:05:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:40,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964985863] [2021-06-05 22:05:40,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964985863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:40,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885787221] [2021-06-05 22:05:40,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:40,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:40,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885787221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:40,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:40,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:40,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954273235] [2021-06-05 22:05:40,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:40,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:40,813 INFO L87 Difference]: Start difference. First operand 854 states and 2942 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:41,692 INFO L93 Difference]: Finished difference Result 1106 states and 3555 transitions. [2021-06-05 22:05:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:05:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:41,694 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 22:05:41,694 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 22:05:41,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 809.9ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 22:05:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 865. [2021-06-05 22:05:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4386574074074074) internal successors, (2971), 864 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2971 transitions. [2021-06-05 22:05:41,704 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2971 transitions. Word has length 20 [2021-06-05 22:05:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:41,704 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2971 transitions. [2021-06-05 22:05:41,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2971 transitions. [2021-06-05 22:05:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:41,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:41,705 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:41,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-06-05 22:05:41,906 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:41,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:41,906 INFO L82 PathProgramCache]: Analyzing trace with hash 890756954, now seen corresponding path program 327 times [2021-06-05 22:05:41,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:41,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745939556] [2021-06-05 22:05:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:41,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:41,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745939556] [2021-06-05 22:05:41,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745939556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:41,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029648119] [2021-06-05 22:05:41,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:42,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:42,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:42,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:42,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:42,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029648119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:42,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:42,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:42,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023756527] [2021-06-05 22:05:42,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:42,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:42,235 INFO L87 Difference]: Start difference. First operand 865 states and 2971 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:42,941 INFO L93 Difference]: Finished difference Result 1010 states and 3342 transitions. [2021-06-05 22:05:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:42,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:42,943 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 22:05:42,943 INFO L226 Difference]: Without dead ends: 1010 [2021-06-05 22:05:42,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:05:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-05 22:05:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 852. [2021-06-05 22:05:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4488836662749707) internal successors, (2935), 851 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2935 transitions. [2021-06-05 22:05:42,952 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2935 transitions. Word has length 20 [2021-06-05 22:05:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:42,952 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2935 transitions. [2021-06-05 22:05:42,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2935 transitions. [2021-06-05 22:05:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:42,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:42,953 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:43,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4150,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:43,154 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:43,154 INFO L82 PathProgramCache]: Analyzing trace with hash 252309210, now seen corresponding path program 328 times [2021-06-05 22:05:43,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:43,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28691116] [2021-06-05 22:05:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:43,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28691116] [2021-06-05 22:05:43,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28691116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384183690] [2021-06-05 22:05:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:43,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:43,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:43,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:43,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:43,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384183690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:43,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:43,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:43,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120687571] [2021-06-05 22:05:43,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:43,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:43,453 INFO L87 Difference]: Start difference. First operand 852 states and 2935 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:43,874 INFO L93 Difference]: Finished difference Result 1054 states and 3451 transitions. [2021-06-05 22:05:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:43,876 INFO L225 Difference]: With dead ends: 1054 [2021-06-05 22:05:43,876 INFO L226 Difference]: Without dead ends: 1054 [2021-06-05 22:05:43,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-06-05 22:05:43,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 848. [2021-06-05 22:05:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.446280991735537) internal successors, (2919), 847 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2919 transitions. [2021-06-05 22:05:43,885 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2919 transitions. Word has length 20 [2021-06-05 22:05:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:43,885 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2919 transitions. [2021-06-05 22:05:43,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2919 transitions. [2021-06-05 22:05:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:43,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:43,886 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:44,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:44,093 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:44,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1435075290, now seen corresponding path program 329 times [2021-06-05 22:05:44,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:44,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324546551] [2021-06-05 22:05:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:44,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324546551] [2021-06-05 22:05:44,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324546551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386738720] [2021-06-05 22:05:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:44,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:44,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386738720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:44,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:44,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825215562] [2021-06-05 22:05:44,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:44,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:44,386 INFO L87 Difference]: Start difference. First operand 848 states and 2919 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:44,866 INFO L93 Difference]: Finished difference Result 1066 states and 3480 transitions. [2021-06-05 22:05:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:44,868 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 22:05:44,868 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 22:05:44,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 22:05:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 849. [2021-06-05 22:05:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4492924528301887) internal successors, (2925), 848 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2925 transitions. [2021-06-05 22:05:44,878 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2925 transitions. Word has length 20 [2021-06-05 22:05:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:44,878 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2925 transitions. [2021-06-05 22:05:44,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2925 transitions. [2021-06-05 22:05:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:44,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:44,879 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:45,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4162 [2021-06-05 22:05:45,080 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:45,080 INFO L82 PathProgramCache]: Analyzing trace with hash -522061666, now seen corresponding path program 330 times [2021-06-05 22:05:45,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:45,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707817967] [2021-06-05 22:05:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:45,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:45,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707817967] [2021-06-05 22:05:45,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707817967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19461475] [2021-06-05 22:05:45,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:45,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:45,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:45,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:45,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:45,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19461475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:45,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:45,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108866133] [2021-06-05 22:05:45,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:45,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:45,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:45,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:45,401 INFO L87 Difference]: Start difference. First operand 849 states and 2925 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:45,903 INFO L93 Difference]: Finished difference Result 1033 states and 3403 transitions. [2021-06-05 22:05:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:45,905 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 22:05:45,905 INFO L226 Difference]: Without dead ends: 1033 [2021-06-05 22:05:45,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:45,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-06-05 22:05:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 845. [2021-06-05 22:05:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-05 22:05:45,914 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-05 22:05:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:45,914 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-05 22:05:45,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-05 22:05:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:45,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:45,915 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:46,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4171 [2021-06-05 22:05:46,116 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash -921302818, now seen corresponding path program 331 times [2021-06-05 22:05:46,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:46,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165979034] [2021-06-05 22:05:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:46,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:46,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165979034] [2021-06-05 22:05:46,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165979034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:46,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103401143] [2021-06-05 22:05:46,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:46,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:46,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:46,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103401143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:46,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:46,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:46,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621754796] [2021-06-05 22:05:46,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:46,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:46,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:46,413 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:47,218 INFO L93 Difference]: Finished difference Result 1224 states and 3846 transitions. [2021-06-05 22:05:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:05:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:47,220 INFO L225 Difference]: With dead ends: 1224 [2021-06-05 22:05:47,220 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 22:05:47,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:05:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 22:05:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 860. [2021-06-05 22:05:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.441210710128056) internal successors, (2956), 859 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2956 transitions. [2021-06-05 22:05:47,231 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2956 transitions. Word has length 20 [2021-06-05 22:05:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:47,231 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2956 transitions. [2021-06-05 22:05:47,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2956 transitions. [2021-06-05 22:05:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:47,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:47,232 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:47,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4177,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:47,433 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash 573109420, now seen corresponding path program 332 times [2021-06-05 22:05:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:47,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690037080] [2021-06-05 22:05:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:47,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:47,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690037080] [2021-06-05 22:05:47,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690037080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:47,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321336762] [2021-06-05 22:05:47,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:47,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:47,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:47,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321336762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140485402] [2021-06-05 22:05:47,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:47,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:47,706 INFO L87 Difference]: Start difference. First operand 860 states and 2956 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:48,280 INFO L93 Difference]: Finished difference Result 1219 states and 3862 transitions. [2021-06-05 22:05:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:48,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:48,282 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 22:05:48,282 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 22:05:48,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 519.1ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 22:05:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 864. [2021-06-05 22:05:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.4484356894553883) internal successors, (2976), 863 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2976 transitions. [2021-06-05 22:05:48,293 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2976 transitions. Word has length 20 [2021-06-05 22:05:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:48,293 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2976 transitions. [2021-06-05 22:05:48,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2976 transitions. [2021-06-05 22:05:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:48,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:48,294 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:48,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4187 [2021-06-05 22:05:48,494 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash -920798302, now seen corresponding path program 333 times [2021-06-05 22:05:48,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:48,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492750316] [2021-06-05 22:05:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:48,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492750316] [2021-06-05 22:05:48,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492750316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972590314] [2021-06-05 22:05:48,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:48,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972590314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:48,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:48,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17885919] [2021-06-05 22:05:48,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:48,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:48,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:48,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:48,772 INFO L87 Difference]: Start difference. First operand 864 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:49,266 INFO L93 Difference]: Finished difference Result 1247 states and 3929 transitions. [2021-06-05 22:05:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:49,268 INFO L225 Difference]: With dead ends: 1247 [2021-06-05 22:05:49,268 INFO L226 Difference]: Without dead ends: 1241 [2021-06-05 22:05:49,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-05 22:05:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 870. [2021-06-05 22:05:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.436133486766398) internal successors, (2986), 869 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2986 transitions. [2021-06-05 22:05:49,279 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2986 transitions. Word has length 20 [2021-06-05 22:05:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:49,280 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2986 transitions. [2021-06-05 22:05:49,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2986 transitions. [2021-06-05 22:05:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:49,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:49,281 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:49,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4194,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:49,481 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:49,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1933226160, now seen corresponding path program 334 times [2021-06-05 22:05:49,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:49,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489411266] [2021-06-05 22:05:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:49,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:49,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489411266] [2021-06-05 22:05:49,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489411266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347139930] [2021-06-05 22:05:49,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:49,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:49,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:49,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:49,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:49,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347139930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:49,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:49,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494713176] [2021-06-05 22:05:49,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:49,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:49,823 INFO L87 Difference]: Start difference. First operand 870 states and 2986 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:50,583 INFO L93 Difference]: Finished difference Result 1257 states and 3946 transitions. [2021-06-05 22:05:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:05:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:50,584 INFO L225 Difference]: With dead ends: 1257 [2021-06-05 22:05:50,584 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 22:05:50,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 721.9ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:05:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 22:05:50,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 867. [2021-06-05 22:05:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.438799076212471) internal successors, (2978), 866 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2978 transitions. [2021-06-05 22:05:50,595 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2978 transitions. Word has length 20 [2021-06-05 22:05:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:50,595 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2978 transitions. [2021-06-05 22:05:50,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2978 transitions. [2021-06-05 22:05:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:50,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:50,597 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:50,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:50,797 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash 261463262, now seen corresponding path program 335 times [2021-06-05 22:05:50,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:50,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756965432] [2021-06-05 22:05:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:50,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:50,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756965432] [2021-06-05 22:05:50,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756965432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:50,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030976204] [2021-06-05 22:05:50,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:50,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:50,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:50,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:51,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030976204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:51,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:51,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:51,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738620520] [2021-06-05 22:05:51,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:51,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:51,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:51,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:51,139 INFO L87 Difference]: Start difference. First operand 867 states and 2978 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:51,956 INFO L93 Difference]: Finished difference Result 1125 states and 3627 transitions. [2021-06-05 22:05:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:51,958 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 22:05:51,958 INFO L226 Difference]: Without dead ends: 1125 [2021-06-05 22:05:51,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 779.9ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:05:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-05 22:05:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 869. [2021-06-05 22:05:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.4412442396313363) internal successors, (2987), 868 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2987 transitions. [2021-06-05 22:05:51,973 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2987 transitions. Word has length 20 [2021-06-05 22:05:51,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:51,973 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2987 transitions. [2021-06-05 22:05:51,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:51,973 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2987 transitions. [2021-06-05 22:05:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:51,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:51,974 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:52,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4217 [2021-06-05 22:05:52,175 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1324509858, now seen corresponding path program 336 times [2021-06-05 22:05:52,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:52,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455119740] [2021-06-05 22:05:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:52,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:52,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455119740] [2021-06-05 22:05:52,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455119740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:52,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129586861] [2021-06-05 22:05:52,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:52,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:52,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:52,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129586861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:52,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:52,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:52,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561999795] [2021-06-05 22:05:52,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:52,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:52,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:52,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:52,462 INFO L87 Difference]: Start difference. First operand 869 states and 2987 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:52,897 INFO L93 Difference]: Finished difference Result 1150 states and 3714 transitions. [2021-06-05 22:05:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:52,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:52,899 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 22:05:52,899 INFO L226 Difference]: Without dead ends: 1150 [2021-06-05 22:05:52,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 445.1ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-06-05 22:05:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 860. [2021-06-05 22:05:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4458672875436553) internal successors, (2960), 859 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2960 transitions. [2021-06-05 22:05:52,909 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2960 transitions. Word has length 20 [2021-06-05 22:05:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:52,909 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2960 transitions. [2021-06-05 22:05:52,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2960 transitions. [2021-06-05 22:05:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:52,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:52,910 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:53,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:53,111 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:53,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1678115038, now seen corresponding path program 337 times [2021-06-05 22:05:53,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:53,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440641809] [2021-06-05 22:05:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:53,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:53,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440641809] [2021-06-05 22:05:53,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440641809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:53,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140336616] [2021-06-05 22:05:53,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:53,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:53,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140336616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:53,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:53,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:53,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010312577] [2021-06-05 22:05:53,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:53,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:53,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:53,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:53,402 INFO L87 Difference]: Start difference. First operand 860 states and 2960 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:53,847 INFO L93 Difference]: Finished difference Result 1119 states and 3647 transitions. [2021-06-05 22:05:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:53,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:53,849 INFO L225 Difference]: With dead ends: 1119 [2021-06-05 22:05:53,849 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 22:05:53,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 22:05:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 859. [2021-06-05 22:05:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.4428904428904428) internal successors, (2954), 858 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2954 transitions. [2021-06-05 22:05:53,858 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2954 transitions. Word has length 20 [2021-06-05 22:05:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:53,858 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2954 transitions. [2021-06-05 22:05:53,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2954 transitions. [2021-06-05 22:05:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:53,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:53,859 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:54,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:54,060 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1345246386, now seen corresponding path program 338 times [2021-06-05 22:05:54,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:54,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109504327] [2021-06-05 22:05:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:54,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109504327] [2021-06-05 22:05:54,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109504327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229624867] [2021-06-05 22:05:54,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:54,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:54,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:54,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229624867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:54,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:54,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309818685] [2021-06-05 22:05:54,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:54,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:54,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:54,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:54,343 INFO L87 Difference]: Start difference. First operand 859 states and 2954 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:54,811 INFO L93 Difference]: Finished difference Result 1150 states and 3688 transitions. [2021-06-05 22:05:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:54,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:54,813 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 22:05:54,813 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 22:05:54,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 22:05:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 869. [2021-06-05 22:05:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.436635944700461) internal successors, (2983), 868 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2983 transitions. [2021-06-05 22:05:54,823 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2983 transitions. Word has length 20 [2021-06-05 22:05:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:54,823 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2983 transitions. [2021-06-05 22:05:54,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2983 transitions. [2021-06-05 22:05:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:54,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:54,824 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:55,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4241,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:55,025 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash -570177540, now seen corresponding path program 339 times [2021-06-05 22:05:55,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:55,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60720210] [2021-06-05 22:05:55,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:55,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60720210] [2021-06-05 22:05:55,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60720210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818134083] [2021-06-05 22:05:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:55,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:55,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:55,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:55,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818134083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:55,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:55,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575009079] [2021-06-05 22:05:55,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:55,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:55,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:55,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:55,335 INFO L87 Difference]: Start difference. First operand 869 states and 2983 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:55,831 INFO L93 Difference]: Finished difference Result 1068 states and 3510 transitions. [2021-06-05 22:05:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:05:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:55,833 INFO L225 Difference]: With dead ends: 1068 [2021-06-05 22:05:55,833 INFO L226 Difference]: Without dead ends: 1068 [2021-06-05 22:05:55,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-06-05 22:05:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 859. [2021-06-05 22:05:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.4428904428904428) internal successors, (2954), 858 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2954 transitions. [2021-06-05 22:05:55,843 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2954 transitions. Word has length 20 [2021-06-05 22:05:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:55,843 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2954 transitions. [2021-06-05 22:05:55,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2954 transitions. [2021-06-05 22:05:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:55,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:55,844 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:56,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:56,044 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:56,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1840840734, now seen corresponding path program 340 times [2021-06-05 22:05:56,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:56,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751231873] [2021-06-05 22:05:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:56,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:56,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751231873] [2021-06-05 22:05:56,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751231873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339492404] [2021-06-05 22:05:56,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:56,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:56,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:56,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339492404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:56,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:56,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665434935] [2021-06-05 22:05:56,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:56,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:56,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:56,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:56,335 INFO L87 Difference]: Start difference. First operand 859 states and 2954 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:56,914 INFO L93 Difference]: Finished difference Result 1087 states and 3531 transitions. [2021-06-05 22:05:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:56,915 INFO L225 Difference]: With dead ends: 1087 [2021-06-05 22:05:56,916 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 22:05:56,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 565.8ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 22:05:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 851. [2021-06-05 22:05:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.451764705882353) internal successors, (2934), 850 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2934 transitions. [2021-06-05 22:05:56,925 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2934 transitions. Word has length 20 [2021-06-05 22:05:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:56,925 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2934 transitions. [2021-06-05 22:05:56,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2934 transitions. [2021-06-05 22:05:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:56,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:56,926 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:57,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-06-05 22:05:57,127 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:57,127 INFO L82 PathProgramCache]: Analyzing trace with hash -829788794, now seen corresponding path program 341 times [2021-06-05 22:05:57,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:57,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486396333] [2021-06-05 22:05:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:57,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:57,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486396333] [2021-06-05 22:05:57,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486396333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:57,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811930436] [2021-06-05 22:05:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:57,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:57,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:57,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:57,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811930436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:57,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:57,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:05:57,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047124366] [2021-06-05 22:05:57,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:57,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:57,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:57,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:57,488 INFO L87 Difference]: Start difference. First operand 851 states and 2934 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:58,095 INFO L93 Difference]: Finished difference Result 1051 states and 3444 transitions. [2021-06-05 22:05:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:58,097 INFO L225 Difference]: With dead ends: 1051 [2021-06-05 22:05:58,097 INFO L226 Difference]: Without dead ends: 1051 [2021-06-05 22:05:58,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-05 22:05:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 844. [2021-06-05 22:05:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.4377224199288254) internal successors, (2898), 843 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2898 transitions. [2021-06-05 22:05:58,106 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2898 transitions. Word has length 20 [2021-06-05 22:05:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:58,106 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2898 transitions. [2021-06-05 22:05:58,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2898 transitions. [2021-06-05 22:05:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:58,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:58,107 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:58,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4262 [2021-06-05 22:05:58,308 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:58,308 INFO L82 PathProgramCache]: Analyzing trace with hash 706464908, now seen corresponding path program 342 times [2021-06-05 22:05:58,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:58,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90108766] [2021-06-05 22:05:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:58,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:58,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90108766] [2021-06-05 22:05:58,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90108766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866233123] [2021-06-05 22:05:58,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:58,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:58,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:58,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:58,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:58,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866233123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:58,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:58,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856521701] [2021-06-05 22:05:58,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:58,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:58,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:58,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:58,584 INFO L87 Difference]: Start difference. First operand 844 states and 2898 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:59,046 INFO L93 Difference]: Finished difference Result 1200 states and 3788 transitions. [2021-06-05 22:05:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:59,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:59,048 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 22:05:59,048 INFO L226 Difference]: Without dead ends: 1193 [2021-06-05 22:05:59,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:05:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-06-05 22:05:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 864. [2021-06-05 22:05:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.436848203939745) internal successors, (2966), 863 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2966 transitions. [2021-06-05 22:05:59,058 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2966 transitions. Word has length 20 [2021-06-05 22:05:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:59,058 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2966 transitions. [2021-06-05 22:05:59,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2966 transitions. [2021-06-05 22:05:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:59,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:59,059 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:59,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4278,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:59,260 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:59,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1527138070, now seen corresponding path program 343 times [2021-06-05 22:05:59,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:59,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640819316] [2021-06-05 22:05:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:59,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:59,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640819316] [2021-06-05 22:05:59,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640819316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933357936] [2021-06-05 22:05:59,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:59,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:05:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:59,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933357936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:59,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:59,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:05:59,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074807836] [2021-06-05 22:05:59,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:59,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:59,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:59,578 INFO L87 Difference]: Start difference. First operand 864 states and 2966 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:00,097 INFO L93 Difference]: Finished difference Result 1123 states and 3606 transitions. [2021-06-05 22:06:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:06:00,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:00,099 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 22:06:00,099 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:06:00,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:06:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 864. [2021-06-05 22:06:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.436848203939745) internal successors, (2966), 863 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2966 transitions. [2021-06-05 22:06:00,109 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2966 transitions. Word has length 20 [2021-06-05 22:06:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:00,109 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2966 transitions. [2021-06-05 22:06:00,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2966 transitions. [2021-06-05 22:06:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:00,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:00,110 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:00,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4285 [2021-06-05 22:06:00,311 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash 706969424, now seen corresponding path program 344 times [2021-06-05 22:06:00,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:00,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873974479] [2021-06-05 22:06:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:00,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:00,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873974479] [2021-06-05 22:06:00,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873974479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:00,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204222836] [2021-06-05 22:06:00,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:00,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:00,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:00,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:00,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204222836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:00,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:00,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:00,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204993409] [2021-06-05 22:06:00,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:00,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:00,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:00,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:00,606 INFO L87 Difference]: Start difference. First operand 864 states and 2966 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:01,216 INFO L93 Difference]: Finished difference Result 1171 states and 3712 transitions. [2021-06-05 22:06:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:01,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:01,218 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 22:06:01,218 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 22:06:01,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 22:06:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 864. [2021-06-05 22:06:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.433371958285052) internal successors, (2963), 863 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2963 transitions. [2021-06-05 22:06:01,228 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2963 transitions. Word has length 20 [2021-06-05 22:06:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:01,229 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2963 transitions. [2021-06-05 22:06:01,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2963 transitions. [2021-06-05 22:06:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:01,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:01,230 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:01,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-06-05 22:06:01,430 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:01,430 INFO L82 PathProgramCache]: Analyzing trace with hash -733973410, now seen corresponding path program 345 times [2021-06-05 22:06:01,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:01,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107479359] [2021-06-05 22:06:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:01,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:01,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107479359] [2021-06-05 22:06:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107479359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:01,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591340785] [2021-06-05 22:06:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:01,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:01,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:01,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:01,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591340785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:01,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:01,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:01,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149742231] [2021-06-05 22:06:01,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:01,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:01,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:01,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:01,700 INFO L87 Difference]: Start difference. First operand 864 states and 2963 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:02,519 INFO L93 Difference]: Finished difference Result 1294 states and 4005 transitions. [2021-06-05 22:06:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:06:02,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:02,521 INFO L225 Difference]: With dead ends: 1294 [2021-06-05 22:06:02,521 INFO L226 Difference]: Without dead ends: 1294 [2021-06-05 22:06:02,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 771.8ms TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:06:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-06-05 22:06:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 861. [2021-06-05 22:06:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.436046511627907) internal successors, (2955), 860 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2955 transitions. [2021-06-05 22:06:02,533 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2955 transitions. Word has length 20 [2021-06-05 22:06:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:02,533 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2955 transitions. [2021-06-05 22:06:02,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2955 transitions. [2021-06-05 22:06:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:02,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:02,534 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:02,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4301,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:02,734 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:02,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1244825002, now seen corresponding path program 346 times [2021-06-05 22:06:02,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:02,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435194905] [2021-06-05 22:06:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:02,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:02,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435194905] [2021-06-05 22:06:02,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435194905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:02,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707970974] [2021-06-05 22:06:02,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:02,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:02,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:02,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:02,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:03,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707970974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:03,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:03,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:03,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892452638] [2021-06-05 22:06:03,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:03,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:03,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:03,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:03,043 INFO L87 Difference]: Start difference. First operand 861 states and 2955 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:03,619 INFO L93 Difference]: Finished difference Result 1093 states and 3531 transitions. [2021-06-05 22:06:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:06:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:03,621 INFO L225 Difference]: With dead ends: 1093 [2021-06-05 22:06:03,621 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 22:06:03,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 22:06:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 861. [2021-06-05 22:06:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.432558139534884) internal successors, (2952), 860 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2952 transitions. [2021-06-05 22:06:03,631 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2952 transitions. Word has length 20 [2021-06-05 22:06:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:03,631 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2952 transitions. [2021-06-05 22:06:03,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2952 transitions. [2021-06-05 22:06:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:03,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:03,632 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:03,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4309,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:03,832 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:03,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:03,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1414823126, now seen corresponding path program 347 times [2021-06-05 22:06:03,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:03,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038429296] [2021-06-05 22:06:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:03,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:03,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038429296] [2021-06-05 22:06:03,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038429296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:03,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575750662] [2021-06-05 22:06:03,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:03,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:03,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:04,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575750662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:04,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:04,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:04,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310966891] [2021-06-05 22:06:04,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:04,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:04,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:04,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:04,124 INFO L87 Difference]: Start difference. First operand 861 states and 2952 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:04,578 INFO L93 Difference]: Finished difference Result 1147 states and 3681 transitions. [2021-06-05 22:06:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:04,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:04,579 INFO L225 Difference]: With dead ends: 1147 [2021-06-05 22:06:04,580 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 22:06:04,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:04,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 22:06:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 858. [2021-06-05 22:06:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.4352392065344226) internal successors, (2944), 857 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2944 transitions. [2021-06-05 22:06:04,589 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2944 transitions. Word has length 20 [2021-06-05 22:06:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:04,589 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2944 transitions. [2021-06-05 22:06:04,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2944 transitions. [2021-06-05 22:06:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:04,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:04,590 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:04,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4318 [2021-06-05 22:06:04,791 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:04,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:04,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1769925290, now seen corresponding path program 348 times [2021-06-05 22:06:04,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:04,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037049167] [2021-06-05 22:06:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:04,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:04,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037049167] [2021-06-05 22:06:04,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037049167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:04,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930797796] [2021-06-05 22:06:04,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:04,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:04,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:04,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:04,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:05,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930797796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:05,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:05,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:05,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198789735] [2021-06-05 22:06:05,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:05,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:05,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:05,082 INFO L87 Difference]: Start difference. First operand 858 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:05,580 INFO L93 Difference]: Finished difference Result 1288 states and 4009 transitions. [2021-06-05 22:06:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:05,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:05,582 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 22:06:05,582 INFO L226 Difference]: Without dead ends: 1281 [2021-06-05 22:06:05,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-05 22:06:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 866. [2021-06-05 22:06:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.446242774566474) internal successors, (2981), 865 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2981 transitions. [2021-06-05 22:06:05,600 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2981 transitions. Word has length 20 [2021-06-05 22:06:05,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:05,600 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2981 transitions. [2021-06-05 22:06:05,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:05,600 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2981 transitions. [2021-06-05 22:06:05,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:05,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:05,601 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:05,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:05,801 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:05,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:05,802 INFO L82 PathProgramCache]: Analyzing trace with hash -275513052, now seen corresponding path program 349 times [2021-06-05 22:06:05,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:05,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817824194] [2021-06-05 22:06:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:05,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:05,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817824194] [2021-06-05 22:06:05,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817824194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:05,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528349327] [2021-06-05 22:06:05,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:06,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528349327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:06,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:06,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:06,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866914118] [2021-06-05 22:06:06,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:06,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:06,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:06,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:06,129 INFO L87 Difference]: Start difference. First operand 866 states and 2981 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:06,790 INFO L93 Difference]: Finished difference Result 1236 states and 3906 transitions. [2021-06-05 22:06:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:06,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:06,792 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 22:06:06,792 INFO L226 Difference]: Without dead ends: 1236 [2021-06-05 22:06:06,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-06-05 22:06:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 870. [2021-06-05 22:06:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4533947065592634) internal successors, (3001), 869 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3001 transitions. [2021-06-05 22:06:06,803 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3001 transitions. Word has length 20 [2021-06-05 22:06:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:06,803 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 3001 transitions. [2021-06-05 22:06:06,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3001 transitions. [2021-06-05 22:06:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:06,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:06,804 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:07,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-06-05 22:06:07,005 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1769420774, now seen corresponding path program 350 times [2021-06-05 22:06:07,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:07,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918913408] [2021-06-05 22:06:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:07,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:07,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918913408] [2021-06-05 22:06:07,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918913408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:07,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59959378] [2021-06-05 22:06:07,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:07,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:07,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:07,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:07,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:07,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59959378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:07,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:07,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799801185] [2021-06-05 22:06:07,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:07,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:07,292 INFO L87 Difference]: Start difference. First operand 870 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:08,015 INFO L93 Difference]: Finished difference Result 1284 states and 4006 transitions. [2021-06-05 22:06:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:06:08,015 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:08,017 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 22:06:08,017 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 22:06:08,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 699.3ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:06:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 22:06:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 876. [2021-06-05 22:06:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.4411428571428573) internal successors, (3011), 875 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:08,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3011 transitions. [2021-06-05 22:06:08,028 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3011 transitions. Word has length 20 [2021-06-05 22:06:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:08,028 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 3011 transitions. [2021-06-05 22:06:08,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3011 transitions. [2021-06-05 22:06:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:08,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:08,029 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:08,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4345,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:08,230 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:08,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1084603688, now seen corresponding path program 351 times [2021-06-05 22:06:08,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:08,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903005983] [2021-06-05 22:06:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:08,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:08,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903005983] [2021-06-05 22:06:08,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903005983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:08,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144125496] [2021-06-05 22:06:08,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:08,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:08,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:08,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144125496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:08,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:08,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:08,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022085584] [2021-06-05 22:06:08,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:08,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:08,498 INFO L87 Difference]: Start difference. First operand 876 states and 3011 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:09,210 INFO L93 Difference]: Finished difference Result 1326 states and 4093 transitions. [2021-06-05 22:06:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:06:09,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:09,211 INFO L225 Difference]: With dead ends: 1326 [2021-06-05 22:06:09,211 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 22:06:09,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:06:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 22:06:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 870. [2021-06-05 22:06:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4395857307249713) internal successors, (2989), 869 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2989 transitions. [2021-06-05 22:06:09,223 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2989 transitions. Word has length 20 [2021-06-05 22:06:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:09,223 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2989 transitions. [2021-06-05 22:06:09,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2989 transitions. [2021-06-05 22:06:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:09,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:09,224 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:09,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-06-05 22:06:09,424 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:09,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1339905262, now seen corresponding path program 352 times [2021-06-05 22:06:09,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:09,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425387934] [2021-06-05 22:06:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:09,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425387934] [2021-06-05 22:06:09,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425387934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867483255] [2021-06-05 22:06:09,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:09,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:09,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:09,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:09,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867483255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:09,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:09,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:09,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392208467] [2021-06-05 22:06:09,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:09,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:09,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:09,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:09,695 INFO L87 Difference]: Start difference. First operand 870 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:10,196 INFO L93 Difference]: Finished difference Result 1196 states and 3793 transitions. [2021-06-05 22:06:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:10,198 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 22:06:10,198 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 22:06:10,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 22:06:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 874. [2021-06-05 22:06:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4421534936998857) internal successors, (3005), 873 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3005 transitions. [2021-06-05 22:06:10,209 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3005 transitions. Word has length 20 [2021-06-05 22:06:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:10,209 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 3005 transitions. [2021-06-05 22:06:10,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:10,209 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3005 transitions. [2021-06-05 22:06:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:10,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:10,210 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:10,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4361 [2021-06-05 22:06:10,417 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:10,417 INFO L82 PathProgramCache]: Analyzing trace with hash -587159210, now seen corresponding path program 353 times [2021-06-05 22:06:10,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:10,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7648895] [2021-06-05 22:06:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:10,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:10,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7648895] [2021-06-05 22:06:10,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7648895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:10,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171988099] [2021-06-05 22:06:10,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:10,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:10,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:10,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171988099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:10,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:10,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:10,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565868006] [2021-06-05 22:06:10,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:10,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:10,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:10,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:10,715 INFO L87 Difference]: Start difference. First operand 874 states and 3005 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:11,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:11,387 INFO L93 Difference]: Finished difference Result 1142 states and 3672 transitions. [2021-06-05 22:06:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:11,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:11,389 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 22:06:11,389 INFO L226 Difference]: Without dead ends: 1142 [2021-06-05 22:06:11,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 646.8ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:06:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-05 22:06:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 872. [2021-06-05 22:06:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.442020665901263) internal successors, (2998), 871 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2998 transitions. [2021-06-05 22:06:11,400 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2998 transitions. Word has length 20 [2021-06-05 22:06:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:11,400 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2998 transitions. [2021-06-05 22:06:11,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2998 transitions. [2021-06-05 22:06:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:11,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:11,401 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:11,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4369,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:11,601 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash 475887386, now seen corresponding path program 354 times [2021-06-05 22:06:11,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:11,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140580267] [2021-06-05 22:06:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:11,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:11,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140580267] [2021-06-05 22:06:11,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140580267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:11,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778033885] [2021-06-05 22:06:11,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:11,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:11,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:11,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:11,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778033885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:11,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:11,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:11,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429688823] [2021-06-05 22:06:11,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:11,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:11,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:11,901 INFO L87 Difference]: Start difference. First operand 872 states and 2998 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:12,422 INFO L93 Difference]: Finished difference Result 1141 states and 3674 transitions. [2021-06-05 22:06:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:12,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:12,423 INFO L225 Difference]: With dead ends: 1141 [2021-06-05 22:06:12,423 INFO L226 Difference]: Without dead ends: 1141 [2021-06-05 22:06:12,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 527.4ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:12,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-06-05 22:06:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 863. [2021-06-05 22:06:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4466357308584685) internal successors, (2971), 862 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2971 transitions. [2021-06-05 22:06:12,433 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2971 transitions. Word has length 20 [2021-06-05 22:06:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:12,433 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2971 transitions. [2021-06-05 22:06:12,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2971 transitions. [2021-06-05 22:06:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:12,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:12,434 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:12,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4376 [2021-06-05 22:06:12,635 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1768229786, now seen corresponding path program 355 times [2021-06-05 22:06:12,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:12,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893126943] [2021-06-05 22:06:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:12,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:12,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893126943] [2021-06-05 22:06:12,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893126943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:12,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713103312] [2021-06-05 22:06:12,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:12,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713103312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:12,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:12,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:12,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912863753] [2021-06-05 22:06:12,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:12,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:12,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:12,959 INFO L87 Difference]: Start difference. First operand 863 states and 2971 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:13,506 INFO L93 Difference]: Finished difference Result 1127 states and 3637 transitions. [2021-06-05 22:06:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:13,507 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 22:06:13,507 INFO L226 Difference]: Without dead ends: 1127 [2021-06-05 22:06:13,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 533.0ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-05 22:06:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 862. [2021-06-05 22:06:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-05 22:06:13,517 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-05 22:06:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:13,517 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-05 22:06:13,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-05 22:06:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:13,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:13,518 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:13,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4388,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:13,719 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:13,719 INFO L82 PathProgramCache]: Analyzing trace with hash 496623914, now seen corresponding path program 356 times [2021-06-05 22:06:13,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:13,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088447661] [2021-06-05 22:06:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:13,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:13,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088447661] [2021-06-05 22:06:13,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088447661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:13,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817162451] [2021-06-05 22:06:13,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:13,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:13,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:14,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817162451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:14,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:14,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:14,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165745293] [2021-06-05 22:06:14,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:14,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:14,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:14,008 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:14,738 INFO L93 Difference]: Finished difference Result 1223 states and 3852 transitions. [2021-06-05 22:06:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:14,740 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 22:06:14,740 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 22:06:14,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:06:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 22:06:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 872. [2021-06-05 22:06:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4374282433983927) internal successors, (2994), 871 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2994 transitions. [2021-06-05 22:06:14,751 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2994 transitions. Word has length 20 [2021-06-05 22:06:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:14,751 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2994 transitions. [2021-06-05 22:06:14,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2994 transitions. [2021-06-05 22:06:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:14,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:14,752 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:14,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4401,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:14,955 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1418800012, now seen corresponding path program 357 times [2021-06-05 22:06:14,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:14,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57470502] [2021-06-05 22:06:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:15,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:15,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57470502] [2021-06-05 22:06:15,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57470502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:15,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686823513] [2021-06-05 22:06:15,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:15,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:15,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:15,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686823513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:15,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:15,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827613102] [2021-06-05 22:06:15,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:15,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:15,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:15,261 INFO L87 Difference]: Start difference. First operand 872 states and 2994 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:15,955 INFO L93 Difference]: Finished difference Result 1145 states and 3682 transitions. [2021-06-05 22:06:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:15,956 INFO L225 Difference]: With dead ends: 1145 [2021-06-05 22:06:15,956 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 22:06:15,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:06:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 22:06:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 862. [2021-06-05 22:06:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-05 22:06:15,966 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-05 22:06:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:15,967 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-05 22:06:15,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-05 22:06:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:15,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:15,968 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:16,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4412,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:16,168 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:16,168 INFO L82 PathProgramCache]: Analyzing trace with hash 992218262, now seen corresponding path program 358 times [2021-06-05 22:06:16,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:16,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291429952] [2021-06-05 22:06:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:16,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291429952] [2021-06-05 22:06:16,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291429952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359089541] [2021-06-05 22:06:16,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:16,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:16,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:16,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359089541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:16,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:16,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888968370] [2021-06-05 22:06:16,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:16,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:16,445 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:17,069 INFO L93 Difference]: Finished difference Result 1172 states and 3759 transitions. [2021-06-05 22:06:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:17,071 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 22:06:17,071 INFO L226 Difference]: Without dead ends: 1172 [2021-06-05 22:06:17,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 590.7ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-05 22:06:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 865. [2021-06-05 22:06:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.449074074074074) internal successors, (2980), 864 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2980 transitions. [2021-06-05 22:06:17,081 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2980 transitions. Word has length 20 [2021-06-05 22:06:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:17,081 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2980 transitions. [2021-06-05 22:06:17,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2980 transitions. [2021-06-05 22:06:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:17,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:17,082 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:17,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-06-05 22:06:17,283 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1678411266, now seen corresponding path program 359 times [2021-06-05 22:06:17,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:17,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757942377] [2021-06-05 22:06:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:17,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:17,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757942377] [2021-06-05 22:06:17,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757942377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495863800] [2021-06-05 22:06:17,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:17,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:17,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:17,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:17,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:17,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495863800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:17,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:17,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853192072] [2021-06-05 22:06:17,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:17,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:17,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:17,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:17,586 INFO L87 Difference]: Start difference. First operand 865 states and 2980 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:18,251 INFO L93 Difference]: Finished difference Result 1136 states and 3679 transitions. [2021-06-05 22:06:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:18,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:18,253 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:06:18,253 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 22:06:18,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 624.5ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:06:18,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 22:06:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 862. [2021-06-05 22:06:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-05 22:06:18,264 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-05 22:06:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:18,264 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-05 22:06:18,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-05 22:06:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:18,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:18,265 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:18,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4429 [2021-06-05 22:06:18,466 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1522233702, now seen corresponding path program 360 times [2021-06-05 22:06:18,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:18,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703640809] [2021-06-05 22:06:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:18,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:18,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703640809] [2021-06-05 22:06:18,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703640809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:18,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974450413] [2021-06-05 22:06:18,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:18,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:18,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974450413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:18,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:18,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:18,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458997579] [2021-06-05 22:06:18,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:18,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:18,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:18,805 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,438 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 22:06:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:19,589 INFO L93 Difference]: Finished difference Result 1088 states and 3528 transitions. [2021-06-05 22:06:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:19,591 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 22:06:19,591 INFO L226 Difference]: Without dead ends: 1076 [2021-06-05 22:06:19,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 819.7ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-06-05 22:06:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 864. [2021-06-05 22:06:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.443800695249131) internal successors, (2972), 863 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2972 transitions. [2021-06-05 22:06:19,601 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2972 transitions. Word has length 20 [2021-06-05 22:06:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:19,601 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2972 transitions. [2021-06-05 22:06:19,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2972 transitions. [2021-06-05 22:06:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:19,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:19,602 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:19,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4436,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:19,802 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:19,802 INFO L82 PathProgramCache]: Analyzing trace with hash -770833264, now seen corresponding path program 361 times [2021-06-05 22:06:19,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:19,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470275383] [2021-06-05 22:06:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:19,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:19,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470275383] [2021-06-05 22:06:19,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470275383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:19,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112058436] [2021-06-05 22:06:19,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:20,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112058436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:20,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:20,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:20,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463966506] [2021-06-05 22:06:20,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:20,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:20,098 INFO L87 Difference]: Start difference. First operand 864 states and 2972 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:20,818 INFO L93 Difference]: Finished difference Result 1117 states and 3590 transitions. [2021-06-05 22:06:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:20,819 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 22:06:20,819 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:06:20,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:06:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 874. [2021-06-05 22:06:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4375715922107677) internal successors, (3001), 873 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3001 transitions. [2021-06-05 22:06:20,829 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3001 transitions. Word has length 20 [2021-06-05 22:06:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:20,829 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 3001 transitions. [2021-06-05 22:06:20,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3001 transitions. [2021-06-05 22:06:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:20,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:20,830 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:21,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4444 [2021-06-05 22:06:21,031 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:21,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1608710106, now seen corresponding path program 362 times [2021-06-05 22:06:21,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:21,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032969054] [2021-06-05 22:06:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:21,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032969054] [2021-06-05 22:06:21,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032969054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805374816] [2021-06-05 22:06:21,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:21,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:21,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:21,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:21,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:21,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805374816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:21,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:21,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:21,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842875727] [2021-06-05 22:06:21,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:21,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:21,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:21,335 INFO L87 Difference]: Start difference. First operand 874 states and 3001 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:21,955 INFO L93 Difference]: Finished difference Result 1029 states and 3397 transitions. [2021-06-05 22:06:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:06:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:21,956 INFO L225 Difference]: With dead ends: 1029 [2021-06-05 22:06:21,956 INFO L226 Difference]: Without dead ends: 1029 [2021-06-05 22:06:21,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-05 22:06:21,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 862. [2021-06-05 22:06:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-05 22:06:21,965 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-05 22:06:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:21,965 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-05 22:06:21,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-05 22:06:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:21,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:21,966 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:22,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4452 [2021-06-05 22:06:22,167 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1449125080, now seen corresponding path program 363 times [2021-06-05 22:06:22,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:22,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248847166] [2021-06-05 22:06:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:22,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:22,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248847166] [2021-06-05 22:06:22,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248847166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54224566] [2021-06-05 22:06:22,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:22,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:22,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:22,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:22,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54224566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:22,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:22,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758264042] [2021-06-05 22:06:22,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:22,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:22,465 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:22,893 INFO L93 Difference]: Finished difference Result 1071 states and 3508 transitions. [2021-06-05 22:06:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:22,895 INFO L225 Difference]: With dead ends: 1071 [2021-06-05 22:06:22,895 INFO L226 Difference]: Without dead ends: 1071 [2021-06-05 22:06:22,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 440.3ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-05 22:06:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 861. [2021-06-05 22:06:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.4453488372093024) internal successors, (2963), 860 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2963 transitions. [2021-06-05 22:06:22,904 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2963 transitions. Word has length 20 [2021-06-05 22:06:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:22,904 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2963 transitions. [2021-06-05 22:06:22,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2963 transitions. [2021-06-05 22:06:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:22,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:22,906 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:23,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4460 [2021-06-05 22:06:23,106 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:23,106 INFO L82 PathProgramCache]: Analyzing trace with hash -697724642, now seen corresponding path program 364 times [2021-06-05 22:06:23,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:23,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187770497] [2021-06-05 22:06:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:23,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:23,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187770497] [2021-06-05 22:06:23,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187770497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:23,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531147879] [2021-06-05 22:06:23,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:23,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:23,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:23,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531147879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:23,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:23,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:23,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928391449] [2021-06-05 22:06:23,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:23,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:23,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:23,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:23,378 INFO L87 Difference]: Start difference. First operand 861 states and 2963 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:23,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:23,898 INFO L93 Difference]: Finished difference Result 1091 states and 3547 transitions. [2021-06-05 22:06:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:23,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:23,900 INFO L225 Difference]: With dead ends: 1091 [2021-06-05 22:06:23,900 INFO L226 Difference]: Without dead ends: 1091 [2021-06-05 22:06:23,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-06-05 22:06:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 860. [2021-06-05 22:06:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4435389988358556) internal successors, (2958), 859 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2958 transitions. [2021-06-05 22:06:23,910 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2958 transitions. Word has length 20 [2021-06-05 22:06:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:23,910 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2958 transitions. [2021-06-05 22:06:23,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2958 transitions. [2021-06-05 22:06:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:23,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:23,911 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:24,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4465,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:24,111 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:24,111 INFO L82 PathProgramCache]: Analyzing trace with hash 926613126, now seen corresponding path program 365 times [2021-06-05 22:06:24,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:24,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874577033] [2021-06-05 22:06:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:24,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874577033] [2021-06-05 22:06:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874577033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971090015] [2021-06-05 22:06:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:24,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:24,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:24,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:24,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:24,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971090015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:24,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:24,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:24,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989969418] [2021-06-05 22:06:24,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:24,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:24,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:24,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:24,393 INFO L87 Difference]: Start difference. First operand 860 states and 2958 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:24,903 INFO L93 Difference]: Finished difference Result 1049 states and 3452 transitions. [2021-06-05 22:06:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:24,905 INFO L225 Difference]: With dead ends: 1049 [2021-06-05 22:06:24,905 INFO L226 Difference]: Without dead ends: 1049 [2021-06-05 22:06:24,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-05 22:06:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 845. [2021-06-05 22:06:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-05 22:06:24,914 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-05 22:06:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:24,914 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-05 22:06:24,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-05 22:06:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:24,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:24,915 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:25,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-06-05 22:06:25,116 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash 501257584, now seen corresponding path program 366 times [2021-06-05 22:06:25,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:25,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991813319] [2021-06-05 22:06:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:25,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991813319] [2021-06-05 22:06:25,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991813319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076403342] [2021-06-05 22:06:25,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:25,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:25,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:25,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:25,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076403342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:25,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:06:25,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265065226] [2021-06-05 22:06:25,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:06:25,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:25,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:06:25,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:06:25,418 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:26,344 INFO L93 Difference]: Finished difference Result 1468 states and 4547 transitions. [2021-06-05 22:06:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:06:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:26,346 INFO L225 Difference]: With dead ends: 1468 [2021-06-05 22:06:26,346 INFO L226 Difference]: Without dead ends: 1468 [2021-06-05 22:06:26,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 838.2ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:06:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-06-05 22:06:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 852. [2021-06-05 22:06:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4512338425381905) internal successors, (2937), 851 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2937 transitions. [2021-06-05 22:06:26,358 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2937 transitions. Word has length 20 [2021-06-05 22:06:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:26,358 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2937 transitions. [2021-06-05 22:06:26,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2937 transitions. [2021-06-05 22:06:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:26,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:26,359 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:26,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4479,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:26,560 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:26,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1814911300, now seen corresponding path program 367 times [2021-06-05 22:06:26,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:26,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201044392] [2021-06-05 22:06:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:26,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:26,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201044392] [2021-06-05 22:06:26,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201044392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:26,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299581710] [2021-06-05 22:06:26,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:26,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:26,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299581710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:26,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:26,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911968701] [2021-06-05 22:06:26,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:26,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:26,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:26,877 INFO L87 Difference]: Start difference. First operand 852 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:27,360 INFO L93 Difference]: Finished difference Result 1191 states and 3856 transitions. [2021-06-05 22:06:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:27,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:27,362 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 22:06:27,362 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 22:06:27,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 22:06:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 852. [2021-06-05 22:06:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4477085781433607) internal successors, (2934), 851 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2934 transitions. [2021-06-05 22:06:27,373 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2934 transitions. Word has length 20 [2021-06-05 22:06:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:27,374 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2934 transitions. [2021-06-05 22:06:27,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2934 transitions. [2021-06-05 22:06:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:27,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:27,382 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:27,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4486 [2021-06-05 22:06:27,583 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:27,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1644913176, now seen corresponding path program 368 times [2021-06-05 22:06:27,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:27,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558584376] [2021-06-05 22:06:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:27,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:27,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558584376] [2021-06-05 22:06:27,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558584376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878797389] [2021-06-05 22:06:27,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:27,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:27,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:27,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878797389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:27,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:06:27,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346017807] [2021-06-05 22:06:27,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:06:27,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:06:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:06:27,839 INFO L87 Difference]: Start difference. First operand 852 states and 2934 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:28,353 INFO L93 Difference]: Finished difference Result 1362 states and 4296 transitions. [2021-06-05 22:06:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:28,355 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 22:06:28,355 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 22:06:28,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 480.8ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 22:06:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 849. [2021-06-05 22:06:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4504716981132075) internal successors, (2926), 848 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2926 transitions. [2021-06-05 22:06:28,366 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2926 transitions. Word has length 20 [2021-06-05 22:06:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:28,366 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2926 transitions. [2021-06-05 22:06:28,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2926 transitions. [2021-06-05 22:06:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:28,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:28,367 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:28,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4493 [2021-06-05 22:06:28,567 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1227165978, now seen corresponding path program 369 times [2021-06-05 22:06:28,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:28,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972968987] [2021-06-05 22:06:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:28,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972968987] [2021-06-05 22:06:28,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972968987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842382890] [2021-06-05 22:06:28,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:28,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:28,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:28,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:28,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842382890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:28,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:28,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:06:28,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350021142] [2021-06-05 22:06:28,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:06:28,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:28,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:06:28,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:06:28,847 INFO L87 Difference]: Start difference. First operand 849 states and 2926 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:29,307 INFO L93 Difference]: Finished difference Result 1223 states and 3916 transitions. [2021-06-05 22:06:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:06:29,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:29,309 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 22:06:29,309 INFO L226 Difference]: Without dead ends: 1205 [2021-06-05 22:06:29,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-05 22:06:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 849. [2021-06-05 22:06:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.446933962264151) internal successors, (2923), 848 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2923 transitions. [2021-06-05 22:06:29,319 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2923 transitions. Word has length 20 [2021-06-05 22:06:29,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:29,319 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2923 transitions. [2021-06-05 22:06:29,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2923 transitions. [2021-06-05 22:06:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:29,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:29,320 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:29,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4497 [2021-06-05 22:06:29,521 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1637361588, now seen corresponding path program 370 times [2021-06-05 22:06:29,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:29,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167371379] [2021-06-05 22:06:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:29,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:29,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167371379] [2021-06-05 22:06:29,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167371379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001912786] [2021-06-05 22:06:29,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:29,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:29,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:29,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:29,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001912786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:29,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:06:29,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832122633] [2021-06-05 22:06:29,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:06:29,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:29,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:06:29,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:06:29,757 INFO L87 Difference]: Start difference. First operand 849 states and 2923 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:30,134 INFO L93 Difference]: Finished difference Result 1355 states and 4290 transitions. [2021-06-05 22:06:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:30,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:30,136 INFO L225 Difference]: With dead ends: 1355 [2021-06-05 22:06:30,136 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 22:06:30,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 22:06:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 846. [2021-06-05 22:06:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.4497041420118344) internal successors, (2915), 845 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2915 transitions. [2021-06-05 22:06:30,148 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2915 transitions. Word has length 20 [2021-06-05 22:06:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:30,148 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2915 transitions. [2021-06-05 22:06:30,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2915 transitions. [2021-06-05 22:06:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:30,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:30,149 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:30,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4504 [2021-06-05 22:06:30,350 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:30,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:30,350 INFO L82 PathProgramCache]: Analyzing trace with hash -99774376, now seen corresponding path program 371 times [2021-06-05 22:06:30,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:30,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839890767] [2021-06-05 22:06:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:30,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:30,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839890767] [2021-06-05 22:06:30,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839890767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:30,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239763942] [2021-06-05 22:06:30,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:30,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:30,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:30,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:30,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:30,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239763942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:30,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:30,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:30,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475278295] [2021-06-05 22:06:30,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:30,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:30,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:30,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:30,617 INFO L87 Difference]: Start difference. First operand 846 states and 2915 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:31,097 INFO L93 Difference]: Finished difference Result 1325 states and 4178 transitions. [2021-06-05 22:06:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:31,099 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 22:06:31,099 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 22:06:31,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 22:06:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 860. [2021-06-05 22:06:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4435389988358556) internal successors, (2958), 859 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2958 transitions. [2021-06-05 22:06:31,110 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2958 transitions. Word has length 20 [2021-06-05 22:06:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:31,110 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2958 transitions. [2021-06-05 22:06:31,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2958 transitions. [2021-06-05 22:06:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:31,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:31,111 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:31,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4509 [2021-06-05 22:06:31,311 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:31,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:31,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1961589942, now seen corresponding path program 372 times [2021-06-05 22:06:31,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:31,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164732076] [2021-06-05 22:06:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:31,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:31,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164732076] [2021-06-05 22:06:31,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164732076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:31,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605103266] [2021-06-05 22:06:31,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:31,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:31,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605103266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:31,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:31,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:31,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052467799] [2021-06-05 22:06:31,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:31,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:31,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:31,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:31,665 INFO L87 Difference]: Start difference. First operand 860 states and 2958 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:32,351 INFO L93 Difference]: Finished difference Result 1210 states and 3880 transitions. [2021-06-05 22:06:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:06:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:32,353 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 22:06:32,353 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 22:06:32,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:06:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 22:06:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 857. [2021-06-05 22:06:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.439252336448598) internal successors, (2944), 856 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2944 transitions. [2021-06-05 22:06:32,363 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2944 transitions. Word has length 20 [2021-06-05 22:06:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:32,363 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2944 transitions. [2021-06-05 22:06:32,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2944 transitions. [2021-06-05 22:06:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:32,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:32,364 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:32,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4516,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:32,564 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:32,564 INFO L82 PathProgramCache]: Analyzing trace with hash -99269860, now seen corresponding path program 373 times [2021-06-05 22:06:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179193927] [2021-06-05 22:06:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:32,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:32,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179193927] [2021-06-05 22:06:32,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179193927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:32,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457645067] [2021-06-05 22:06:32,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:32,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:32,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:32,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457645067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:32,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:32,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:32,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472851732] [2021-06-05 22:06:32,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:32,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:32,897 INFO L87 Difference]: Start difference. First operand 857 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:33,694 INFO L93 Difference]: Finished difference Result 1264 states and 4001 transitions. [2021-06-05 22:06:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:33,696 INFO L225 Difference]: With dead ends: 1264 [2021-06-05 22:06:33,696 INFO L226 Difference]: Without dead ends: 1258 [2021-06-05 22:06:33,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 819.2ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-06-05 22:06:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 857. [2021-06-05 22:06:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.435747663551402) internal successors, (2941), 856 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2941 transitions. [2021-06-05 22:06:33,706 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2941 transitions. Word has length 20 [2021-06-05 22:06:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:33,706 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2941 transitions. [2021-06-05 22:06:33,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2941 transitions. [2021-06-05 22:06:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:33,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:33,707 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:33,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4527 [2021-06-05 22:06:33,908 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1540212694, now seen corresponding path program 374 times [2021-06-05 22:06:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:33,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730804843] [2021-06-05 22:06:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:33,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:33,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730804843] [2021-06-05 22:06:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730804843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098855817] [2021-06-05 22:06:33,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:34,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:34,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:34,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:34,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:34,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098855817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:34,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:34,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:34,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124303313] [2021-06-05 22:06:34,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:34,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:34,188 INFO L87 Difference]: Start difference. First operand 857 states and 2941 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:35,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:35,121 INFO L93 Difference]: Finished difference Result 1402 states and 4346 transitions. [2021-06-05 22:06:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:06:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:35,124 INFO L225 Difference]: With dead ends: 1402 [2021-06-05 22:06:35,124 INFO L226 Difference]: Without dead ends: 1402 [2021-06-05 22:06:35,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 874.3ms TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:06:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-06-05 22:06:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 854. [2021-06-05 22:06:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4384525205158263) internal successors, (2933), 853 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2933 transitions. [2021-06-05 22:06:35,137 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2933 transitions. Word has length 20 [2021-06-05 22:06:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:35,137 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2933 transitions. [2021-06-05 22:06:35,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2933 transitions. [2021-06-05 22:06:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:35,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:35,138 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:35,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4537,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:35,355 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:35,355 INFO L82 PathProgramCache]: Analyzing trace with hash 438585718, now seen corresponding path program 375 times [2021-06-05 22:06:35,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:35,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199058707] [2021-06-05 22:06:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:35,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:35,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199058707] [2021-06-05 22:06:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199058707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:35,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772930550] [2021-06-05 22:06:35,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:35,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:35,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:35,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772930550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:35,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:35,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739955428] [2021-06-05 22:06:35,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:35,694 INFO L87 Difference]: Start difference. First operand 854 states and 2933 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:36,309 INFO L93 Difference]: Finished difference Result 1186 states and 3820 transitions. [2021-06-05 22:06:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:06:36,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:36,311 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 22:06:36,311 INFO L226 Difference]: Without dead ends: 1174 [2021-06-05 22:06:36,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 670.6ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-05 22:06:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 854. [2021-06-05 22:06:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4349355216881596) internal successors, (2930), 853 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2930 transitions. [2021-06-05 22:06:36,321 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2930 transitions. Word has length 20 [2021-06-05 22:06:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:36,321 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2930 transitions. [2021-06-05 22:06:36,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2930 transitions. [2021-06-05 22:06:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:36,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:36,322 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:36,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4543,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:36,522 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:36,523 INFO L82 PathProgramCache]: Analyzing trace with hash 608583842, now seen corresponding path program 376 times [2021-06-05 22:06:36,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:36,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181729451] [2021-06-05 22:06:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:36,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:36,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181729451] [2021-06-05 22:06:36,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181729451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:36,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419290936] [2021-06-05 22:06:36,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:36,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:36,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:36,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:36,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:36,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419290936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:36,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:36,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:36,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627095174] [2021-06-05 22:06:36,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:36,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:36,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:36,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:36,789 INFO L87 Difference]: Start difference. First operand 854 states and 2930 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:37,322 INFO L93 Difference]: Finished difference Result 1269 states and 4057 transitions. [2021-06-05 22:06:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:37,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:37,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:37,324 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 22:06:37,324 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 22:06:37,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 22:06:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 851. [2021-06-05 22:06:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.4376470588235293) internal successors, (2922), 850 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2922 transitions. [2021-06-05 22:06:37,335 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2922 transitions. Word has length 20 [2021-06-05 22:06:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:37,335 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2922 transitions. [2021-06-05 22:06:37,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2922 transitions. [2021-06-05 22:06:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:37,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:37,336 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:37,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4550 [2021-06-05 22:06:37,536 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:37,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1718802722, now seen corresponding path program 377 times [2021-06-05 22:06:37,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:37,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665273387] [2021-06-05 22:06:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:37,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:37,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665273387] [2021-06-05 22:06:37,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665273387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:37,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034054266] [2021-06-05 22:06:37,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:37,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:37,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034054266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:37,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:37,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:37,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978838231] [2021-06-05 22:06:37,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:37,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:37,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:37,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:37,818 INFO L87 Difference]: Start difference. First operand 851 states and 2922 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:38,382 INFO L93 Difference]: Finished difference Result 1407 states and 4378 transitions. [2021-06-05 22:06:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:38,385 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 22:06:38,385 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 22:06:38,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 538.6ms TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 22:06:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 859. [2021-06-05 22:06:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.448717948717949) internal successors, (2959), 858 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2959 transitions. [2021-06-05 22:06:38,399 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2959 transitions. Word has length 20 [2021-06-05 22:06:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:38,399 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2959 transitions. [2021-06-05 22:06:38,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2959 transitions. [2021-06-05 22:06:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:38,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:38,400 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:38,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4555,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:38,619 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1081752336, now seen corresponding path program 378 times [2021-06-05 22:06:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:38,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619751563] [2021-06-05 22:06:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:38,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:38,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619751563] [2021-06-05 22:06:38,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619751563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:38,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843367129] [2021-06-05 22:06:38,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:38,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:38,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:38,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843367129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:38,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:38,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:38,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790996611] [2021-06-05 22:06:38,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:38,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:38,933 INFO L87 Difference]: Start difference. First operand 859 states and 2959 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:39,767 INFO L93 Difference]: Finished difference Result 1304 states and 4124 transitions. [2021-06-05 22:06:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:39,768 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 22:06:39,768 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 22:06:39,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 830.1ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 22:06:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 863. [2021-06-05 22:06:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4559164733178656) internal successors, (2979), 862 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2979 transitions. [2021-06-05 22:06:39,780 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2979 transitions. Word has length 20 [2021-06-05 22:06:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:39,780 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2979 transitions. [2021-06-05 22:06:39,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2979 transitions. [2021-06-05 22:06:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:39,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:39,781 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:39,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4562 [2021-06-05 22:06:39,981 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1719307238, now seen corresponding path program 379 times [2021-06-05 22:06:39,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:39,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949146740] [2021-06-05 22:06:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:40,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:40,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949146740] [2021-06-05 22:06:40,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949146740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:40,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338436552] [2021-06-05 22:06:40,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:40,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:40,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338436552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:40,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:40,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:40,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986902247] [2021-06-05 22:06:40,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:40,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:40,297 INFO L87 Difference]: Start difference. First operand 863 states and 2979 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:41,297 INFO L93 Difference]: Finished difference Result 1358 states and 4239 transitions. [2021-06-05 22:06:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:41,299 INFO L225 Difference]: With dead ends: 1358 [2021-06-05 22:06:41,299 INFO L226 Difference]: Without dead ends: 1352 [2021-06-05 22:06:41,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 984.3ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:06:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-06-05 22:06:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 869. [2021-06-05 22:06:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.443548387096774) internal successors, (2989), 868 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2989 transitions. [2021-06-05 22:06:41,310 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2989 transitions. Word has length 20 [2021-06-05 22:06:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:41,310 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2989 transitions. [2021-06-05 22:06:41,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2989 transitions. [2021-06-05 22:06:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:41,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:41,311 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:41,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4577,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:41,520 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:41,521 INFO L82 PathProgramCache]: Analyzing trace with hash 278364404, now seen corresponding path program 380 times [2021-06-05 22:06:41,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:41,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292687157] [2021-06-05 22:06:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:41,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292687157] [2021-06-05 22:06:41,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292687157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351909418] [2021-06-05 22:06:41,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:41,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:41,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:41,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:41,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351909418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:41,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:41,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:41,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305997408] [2021-06-05 22:06:41,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:41,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:41,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:41,789 INFO L87 Difference]: Start difference. First operand 869 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:42,591 INFO L93 Difference]: Finished difference Result 1431 states and 4427 transitions. [2021-06-05 22:06:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:06:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:42,593 INFO L225 Difference]: With dead ends: 1431 [2021-06-05 22:06:42,593 INFO L226 Difference]: Without dead ends: 1431 [2021-06-05 22:06:42,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 755.2ms TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:06:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-06-05 22:06:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 863. [2021-06-05 22:06:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4419953596287702) internal successors, (2967), 862 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:42,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2967 transitions. [2021-06-05 22:06:42,605 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2967 transitions. Word has length 20 [2021-06-05 22:06:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:42,605 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2967 transitions. [2021-06-05 22:06:42,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2967 transitions. [2021-06-05 22:06:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:42,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:42,606 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:42,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4589,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:42,807 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash 533665978, now seen corresponding path program 381 times [2021-06-05 22:06:42,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:42,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338213955] [2021-06-05 22:06:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:42,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:42,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338213955] [2021-06-05 22:06:42,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338213955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:42,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048004324] [2021-06-05 22:06:42,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:42,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:42,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:42,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:43,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048004324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:43,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:43,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:43,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043417934] [2021-06-05 22:06:43,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:43,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:43,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:43,107 INFO L87 Difference]: Start difference. First operand 863 states and 2967 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:43,670 INFO L93 Difference]: Finished difference Result 1315 states and 4162 transitions. [2021-06-05 22:06:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:43,672 INFO L225 Difference]: With dead ends: 1315 [2021-06-05 22:06:43,672 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 22:06:43,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 22:06:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 867. [2021-06-05 22:06:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.4422632794457275) internal successors, (2981), 866 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2981 transitions. [2021-06-05 22:06:43,683 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2981 transitions. Word has length 20 [2021-06-05 22:06:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:43,683 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2981 transitions. [2021-06-05 22:06:43,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2981 transitions. [2021-06-05 22:06:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:43,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:43,684 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:43,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4597,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:43,884 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1393398494, now seen corresponding path program 382 times [2021-06-05 22:06:43,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:43,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121531131] [2021-06-05 22:06:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:43,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:43,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121531131] [2021-06-05 22:06:43,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121531131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:43,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899644015] [2021-06-05 22:06:43,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:44,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:44,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:44,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:44,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:44,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899644015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:44,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:44,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:44,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434502409] [2021-06-05 22:06:44,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:44,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:44,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:44,195 INFO L87 Difference]: Start difference. First operand 867 states and 2981 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:45,010 INFO L93 Difference]: Finished difference Result 1285 states and 4089 transitions. [2021-06-05 22:06:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:45,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:45,012 INFO L225 Difference]: With dead ends: 1285 [2021-06-05 22:06:45,012 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 22:06:45,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 788.8ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:06:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 22:06:45,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 865. [2021-06-05 22:06:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4444444444444446) internal successors, (2976), 864 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2976 transitions. [2021-06-05 22:06:45,024 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2976 transitions. Word has length 20 [2021-06-05 22:06:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:45,024 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2976 transitions. [2021-06-05 22:06:45,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2976 transitions. [2021-06-05 22:06:45,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:45,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:45,025 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:45,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4606,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:45,226 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:45,226 INFO L82 PathProgramCache]: Analyzing trace with hash -330351898, now seen corresponding path program 383 times [2021-06-05 22:06:45,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:45,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478698833] [2021-06-05 22:06:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:45,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:45,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478698833] [2021-06-05 22:06:45,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478698833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:45,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45324418] [2021-06-05 22:06:45,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:45,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:45,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:45,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:45,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45324418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:45,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:45,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:45,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381761177] [2021-06-05 22:06:45,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:45,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:45,596 INFO L87 Difference]: Start difference. First operand 865 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:46,291 INFO L93 Difference]: Finished difference Result 1222 states and 3924 transitions. [2021-06-05 22:06:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:46,293 INFO L225 Difference]: With dead ends: 1222 [2021-06-05 22:06:46,293 INFO L226 Difference]: Without dead ends: 1222 [2021-06-05 22:06:46,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:06:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-05 22:06:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 856. [2021-06-05 22:06:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.449122807017544) internal successors, (2949), 855 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2949 transitions. [2021-06-05 22:06:46,304 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2949 transitions. Word has length 20 [2021-06-05 22:06:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:46,304 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2949 transitions. [2021-06-05 22:06:46,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2949 transitions. [2021-06-05 22:06:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:46,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:46,305 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:46,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4613 [2021-06-05 22:06:46,505 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 961990502, now seen corresponding path program 384 times [2021-06-05 22:06:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:46,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358912696] [2021-06-05 22:06:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:46,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:46,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358912696] [2021-06-05 22:06:46,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358912696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:46,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105846641] [2021-06-05 22:06:46,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:46,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:46,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:46,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:46,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105846641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:46,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:46,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:46,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130468036] [2021-06-05 22:06:46,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:46,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:46,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:46,835 INFO L87 Difference]: Start difference. First operand 856 states and 2949 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:47,501 INFO L93 Difference]: Finished difference Result 1185 states and 3842 transitions. [2021-06-05 22:06:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:47,502 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:47,503 INFO L225 Difference]: With dead ends: 1185 [2021-06-05 22:06:47,503 INFO L226 Difference]: Without dead ends: 1185 [2021-06-05 22:06:47,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-06-05 22:06:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 855. [2021-06-05 22:06:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.446135831381733) internal successors, (2943), 854 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2943 transitions. [2021-06-05 22:06:47,513 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2943 transitions. Word has length 20 [2021-06-05 22:06:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:47,513 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2943 transitions. [2021-06-05 22:06:47,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2943 transitions. [2021-06-05 22:06:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:47,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:47,514 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:47,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4626,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:47,715 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:47,715 INFO L82 PathProgramCache]: Analyzing trace with hash -309615370, now seen corresponding path program 385 times [2021-06-05 22:06:47,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:47,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626841302] [2021-06-05 22:06:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:47,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:47,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626841302] [2021-06-05 22:06:47,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626841302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:47,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515212496] [2021-06-05 22:06:47,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:48,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515212496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:48,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:48,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:48,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621787538] [2021-06-05 22:06:48,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:48,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:48,020 INFO L87 Difference]: Start difference. First operand 855 states and 2943 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:48,985 INFO L93 Difference]: Finished difference Result 1274 states and 4040 transitions. [2021-06-05 22:06:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:48,987 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 22:06:48,987 INFO L226 Difference]: Without dead ends: 1268 [2021-06-05 22:06:48,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 931.0ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-06-05 22:06:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 865. [2021-06-05 22:06:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.439814814814815) internal successors, (2972), 864 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2972 transitions. [2021-06-05 22:06:48,997 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2972 transitions. Word has length 20 [2021-06-05 22:06:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:48,998 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2972 transitions. [2021-06-05 22:06:48,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2972 transitions. [2021-06-05 22:06:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:48,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:48,999 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:49,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4633 [2021-06-05 22:06:49,199 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2069928000, now seen corresponding path program 386 times [2021-06-05 22:06:49,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:49,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825915700] [2021-06-05 22:06:49,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:49,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:49,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825915700] [2021-06-05 22:06:49,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825915700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:49,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784610820] [2021-06-05 22:06:49,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:49,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:49,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:49,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784610820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:49,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:49,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:49,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730883340] [2021-06-05 22:06:49,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:49,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:49,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:49,523 INFO L87 Difference]: Start difference. First operand 865 states and 2972 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:50,376 INFO L93 Difference]: Finished difference Result 1209 states and 3902 transitions. [2021-06-05 22:06:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:50,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:50,377 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 22:06:50,377 INFO L226 Difference]: Without dead ends: 1209 [2021-06-05 22:06:50,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:50,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-05 22:06:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 855. [2021-06-05 22:06:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.446135831381733) internal successors, (2943), 854 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2943 transitions. [2021-06-05 22:06:50,392 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2943 transitions. Word has length 20 [2021-06-05 22:06:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:50,392 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2943 transitions. [2021-06-05 22:06:50,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2943 transitions. [2021-06-05 22:06:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:50,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:50,393 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:50,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4643,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:50,594 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:50,594 INFO L82 PathProgramCache]: Analyzing trace with hash 185978978, now seen corresponding path program 387 times [2021-06-05 22:06:50,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:50,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063799631] [2021-06-05 22:06:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:50,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:50,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063799631] [2021-06-05 22:06:50,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063799631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:50,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089178147] [2021-06-05 22:06:50,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:50,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:50,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:50,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:50,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089178147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:50,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:50,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:50,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496959235] [2021-06-05 22:06:50,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:50,867 INFO L87 Difference]: Start difference. First operand 855 states and 2943 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:51,585 INFO L93 Difference]: Finished difference Result 1313 states and 4171 transitions. [2021-06-05 22:06:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:51,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:51,587 INFO L225 Difference]: With dead ends: 1313 [2021-06-05 22:06:51,587 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 22:06:51,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 22:06:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 858. [2021-06-05 22:06:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.4515752625437575) internal successors, (2958), 857 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2958 transitions. [2021-06-05 22:06:51,604 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2958 transitions. Word has length 20 [2021-06-05 22:06:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:51,604 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2958 transitions. [2021-06-05 22:06:51,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2958 transitions. [2021-06-05 22:06:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:51,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:51,605 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:51,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4654,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:51,805 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1810316746, now seen corresponding path program 388 times [2021-06-05 22:06:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823449450] [2021-06-05 22:06:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:51,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:51,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823449450] [2021-06-05 22:06:51,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823449450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:51,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353980202] [2021-06-05 22:06:51,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:51,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:51,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:51,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:52,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353980202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:52,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:52,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:52,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085569583] [2021-06-05 22:06:52,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:52,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:52,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:52,094 INFO L87 Difference]: Start difference. First operand 858 states and 2958 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:52,838 INFO L93 Difference]: Finished difference Result 1277 states and 4091 transitions. [2021-06-05 22:06:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:52,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:52,840 INFO L225 Difference]: With dead ends: 1277 [2021-06-05 22:06:52,840 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 22:06:52,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:06:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 22:06:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 854. [2021-06-05 22:06:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-05 22:06:52,857 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-05 22:06:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:52,857 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-05 22:06:52,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-05 22:06:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:52,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:52,858 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:53,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4662 [2021-06-05 22:06:53,058 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1966494310, now seen corresponding path program 389 times [2021-06-05 22:06:53,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:53,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507401388] [2021-06-05 22:06:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:53,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507401388] [2021-06-05 22:06:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507401388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:53,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136436066] [2021-06-05 22:06:53,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:53,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:53,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:53,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:53,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:53,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136436066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:53,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:53,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:53,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013044560] [2021-06-05 22:06:53,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:53,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:53,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:53,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:53,364 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:54,115 INFO L93 Difference]: Finished difference Result 1185 states and 3822 transitions. [2021-06-05 22:06:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:54,117 INFO L225 Difference]: With dead ends: 1185 [2021-06-05 22:06:54,117 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 22:06:54,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 730.9ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 22:06:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 856. [2021-06-05 22:06:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.4432748538011695) internal successors, (2944), 855 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2944 transitions. [2021-06-05 22:06:54,126 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2944 transitions. Word has length 20 [2021-06-05 22:06:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:54,126 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2944 transitions. [2021-06-05 22:06:54,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2944 transitions. [2021-06-05 22:06:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:54,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:54,127 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:54,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:54,328 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1577072548, now seen corresponding path program 390 times [2021-06-05 22:06:54,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:54,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407306338] [2021-06-05 22:06:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:54,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:54,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407306338] [2021-06-05 22:06:54,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407306338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:54,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474395268] [2021-06-05 22:06:54,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:54,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:54,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:54,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:54,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474395268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:54,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:54,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:54,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909014482] [2021-06-05 22:06:54,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:54,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:54,651 INFO L87 Difference]: Start difference. First operand 856 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:55,617 INFO L93 Difference]: Finished difference Result 1214 states and 3884 transitions. [2021-06-05 22:06:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:55,618 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 22:06:55,619 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 22:06:55,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 946.5ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 22:06:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 866. [2021-06-05 22:06:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.436994219653179) internal successors, (2973), 865 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2973 transitions. [2021-06-05 22:06:55,629 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2973 transitions. Word has length 20 [2021-06-05 22:06:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:55,629 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2973 transitions. [2021-06-05 22:06:55,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2973 transitions. [2021-06-05 22:06:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:55,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:55,630 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:55,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4678 [2021-06-05 22:06:55,831 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash 802470822, now seen corresponding path program 391 times [2021-06-05 22:06:55,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:55,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170096947] [2021-06-05 22:06:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:55,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:55,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170096947] [2021-06-05 22:06:55,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170096947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:55,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459238782] [2021-06-05 22:06:55,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:55,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:55,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:56,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459238782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:56,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:56,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593853269] [2021-06-05 22:06:56,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:56,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:56,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:56,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:56,164 INFO L87 Difference]: Start difference. First operand 866 states and 2973 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:56,927 INFO L93 Difference]: Finished difference Result 1143 states and 3731 transitions. [2021-06-05 22:06:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:06:56,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:56,929 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 22:06:56,929 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 22:06:56,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 768.6ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 22:06:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 854. [2021-06-05 22:06:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-05 22:06:56,938 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-05 22:06:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:56,939 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-05 22:06:56,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-05 22:06:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:56,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:56,940 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:57,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4685,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:57,140 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:57,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2039602932, now seen corresponding path program 392 times [2021-06-05 22:06:57,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:57,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903887396] [2021-06-05 22:06:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:57,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:57,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903887396] [2021-06-05 22:06:57,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903887396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:57,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737893894] [2021-06-05 22:06:57,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:57,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:57,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:57,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737893894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:57,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:57,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:57,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202764935] [2021-06-05 22:06:57,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:57,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:57,403 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:57,853 INFO L93 Difference]: Finished difference Result 1208 states and 3931 transitions. [2021-06-05 22:06:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:06:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:57,855 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 22:06:57,855 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 22:06:57,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 22:06:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 857. [2021-06-05 22:06:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.4485981308411215) internal successors, (2952), 856 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2952 transitions. [2021-06-05 22:06:57,865 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2952 transitions. Word has length 20 [2021-06-05 22:06:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2952 transitions. [2021-06-05 22:06:57,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2952 transitions. [2021-06-05 22:06:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:57,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:57,866 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:58,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-06-05 22:06:58,066 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1503963926, now seen corresponding path program 393 times [2021-06-05 22:06:58,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:58,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803863921] [2021-06-05 22:06:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:58,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:58,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803863921] [2021-06-05 22:06:58,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803863921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:58,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713717579] [2021-06-05 22:06:58,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:58,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:06:58,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:58,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:58,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:58,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713717579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:58,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:58,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:06:58,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365834139] [2021-06-05 22:06:58,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:58,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:58,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:58,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:58,353 INFO L87 Difference]: Start difference. First operand 857 states and 2952 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:58,916 INFO L93 Difference]: Finished difference Result 1241 states and 4014 transitions. [2021-06-05 22:06:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:06:58,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:06:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:58,924 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 22:06:58,924 INFO L226 Difference]: Without dead ends: 1241 [2021-06-05 22:06:58,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-05 22:06:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 860. [2021-06-05 22:06:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.454016298020955) internal successors, (2967), 859 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2967 transitions. [2021-06-05 22:06:58,935 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2967 transitions. Word has length 20 [2021-06-05 22:06:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:58,935 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2967 transitions. [2021-06-05 22:06:58,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2967 transitions. [2021-06-05 22:06:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:06:58,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:58,936 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:59,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4697,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:59,136 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:59,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:59,137 INFO L82 PathProgramCache]: Analyzing trace with hash 120373842, now seen corresponding path program 394 times [2021-06-05 22:06:59,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:59,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235331736] [2021-06-05 22:06:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:59,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:59,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235331736] [2021-06-05 22:06:59,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235331736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:59,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020886993] [2021-06-05 22:06:59,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:59,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:59,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:06:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:59,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020886993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:59,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:59,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:06:59,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665021140] [2021-06-05 22:06:59,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:59,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:59,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:59,448 INFO L87 Difference]: Start difference. First operand 860 states and 2967 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:00,053 INFO L93 Difference]: Finished difference Result 1199 states and 3919 transitions. [2021-06-05 22:07:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:00,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:00,055 INFO L225 Difference]: With dead ends: 1199 [2021-06-05 22:07:00,055 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 22:07:00,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:07:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 22:07:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 854. [2021-06-05 22:07:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-05 22:07:00,065 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-05 22:07:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:00,065 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-05 22:07:00,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-05 22:07:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:00,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:00,066 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:00,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4704 [2021-06-05 22:07:00,281 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1106639882, now seen corresponding path program 395 times [2021-06-05 22:07:00,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:00,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973826443] [2021-06-05 22:07:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:00,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:00,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973826443] [2021-06-05 22:07:00,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973826443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:00,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818221685] [2021-06-05 22:07:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:00,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:00,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:00,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818221685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:00,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:00,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:00,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325532916] [2021-06-05 22:07:00,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:00,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:00,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:00,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:00,561 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:01,075 INFO L93 Difference]: Finished difference Result 1151 states and 3726 transitions. [2021-06-05 22:07:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:07:01,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:01,076 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 22:07:01,076 INFO L226 Difference]: Without dead ends: 1133 [2021-06-05 22:07:01,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 528.8ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-05 22:07:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 856. [2021-06-05 22:07:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.44093567251462) internal successors, (2942), 855 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2942 transitions. [2021-06-05 22:07:01,086 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2942 transitions. Word has length 20 [2021-06-05 22:07:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:01,086 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2942 transitions. [2021-06-05 22:07:01,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2942 transitions. [2021-06-05 22:07:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:01,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:01,087 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:01,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4711,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:01,288 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash 905716220, now seen corresponding path program 396 times [2021-06-05 22:07:01,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:01,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444700069] [2021-06-05 22:07:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:01,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444700069] [2021-06-05 22:07:01,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444700069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065446111] [2021-06-05 22:07:01,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:01,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:01,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065446111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:01,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:01,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:07:01,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110645024] [2021-06-05 22:07:01,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:01,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:01,595 INFO L87 Difference]: Start difference. First operand 856 states and 2942 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:02,191 INFO L93 Difference]: Finished difference Result 1143 states and 3702 transitions. [2021-06-05 22:07:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:02,192 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 22:07:02,192 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 22:07:02,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 615.0ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 22:07:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 858. [2021-06-05 22:07:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.441073512252042) internal successors, (2949), 857 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2949 transitions. [2021-06-05 22:07:02,203 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2949 transitions. Word has length 20 [2021-06-05 22:07:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:02,203 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2949 transitions. [2021-06-05 22:07:02,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2949 transitions. [2021-06-05 22:07:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:02,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:02,204 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:02,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-06-05 22:07:02,404 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:02,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1657116658, now seen corresponding path program 397 times [2021-06-05 22:07:02,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:02,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133649059] [2021-06-05 22:07:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:02,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:02,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133649059] [2021-06-05 22:07:02,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133649059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:02,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513861429] [2021-06-05 22:07:02,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:02,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:02,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513861429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:02,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:02,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:07:02,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483631263] [2021-06-05 22:07:02,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:02,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:02,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:02,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:02,722 INFO L87 Difference]: Start difference. First operand 858 states and 2949 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,497 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-06-05 22:07:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:03,509 INFO L93 Difference]: Finished difference Result 1172 states and 3764 transitions. [2021-06-05 22:07:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:03,511 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 22:07:03,511 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 22:07:03,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 795.6ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:07:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 22:07:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 868. [2021-06-05 22:07:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4348327566320647) internal successors, (2978), 867 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2978 transitions. [2021-06-05 22:07:03,521 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2978 transitions. Word has length 20 [2021-06-05 22:07:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:03,521 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2978 transitions. [2021-06-05 22:07:03,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2978 transitions. [2021-06-05 22:07:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:03,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:03,522 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:03,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4727,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:03,723 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -258307268, now seen corresponding path program 398 times [2021-06-05 22:07:03,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:03,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751017536] [2021-06-05 22:07:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:03,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:03,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751017536] [2021-06-05 22:07:03,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751017536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:03,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504798682] [2021-06-05 22:07:03,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:03,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:03,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:04,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504798682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:04,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:04,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:07:04,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777029118] [2021-06-05 22:07:04,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:04,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:04,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:04,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:04,081 INFO L87 Difference]: Start difference. First operand 868 states and 2978 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:04,548 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-05 22:07:04,680 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-05 22:07:04,802 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-05 22:07:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:04,876 INFO L93 Difference]: Finished difference Result 1114 states and 3656 transitions. [2021-06-05 22:07:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:04,877 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 22:07:04,877 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 22:07:04,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 825.3ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 22:07:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 856. [2021-06-05 22:07:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.44093567251462) internal successors, (2942), 855 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2942 transitions. [2021-06-05 22:07:04,887 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2942 transitions. Word has length 20 [2021-06-05 22:07:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:04,887 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2942 transitions. [2021-06-05 22:07:04,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2942 transitions. [2021-06-05 22:07:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:04,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:04,888 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:05,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:05,089 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:05,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1245686878, now seen corresponding path program 399 times [2021-06-05 22:07:05,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:05,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254860275] [2021-06-05 22:07:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:05,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:05,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254860275] [2021-06-05 22:07:05,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254860275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:05,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002887413] [2021-06-05 22:07:05,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:05,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:05,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:05,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:05,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002887413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:05,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:05,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:05,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241363077] [2021-06-05 22:07:05,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:05,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:05,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:05,409 INFO L87 Difference]: Start difference. First operand 856 states and 2942 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:05,777 INFO L93 Difference]: Finished difference Result 1271 states and 4076 transitions. [2021-06-05 22:07:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:05,778 INFO L225 Difference]: With dead ends: 1271 [2021-06-05 22:07:05,778 INFO L226 Difference]: Without dead ends: 1271 [2021-06-05 22:07:05,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-05 22:07:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 849. [2021-06-05 22:07:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4351415094339623) internal successors, (2913), 848 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2913 transitions. [2021-06-05 22:07:05,789 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2913 transitions. Word has length 20 [2021-06-05 22:07:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:05,789 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2913 transitions. [2021-06-05 22:07:05,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2913 transitions. [2021-06-05 22:07:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:05,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:05,790 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:05,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4747,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:05,991 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash 766669224, now seen corresponding path program 400 times [2021-06-05 22:07:05,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:05,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020056527] [2021-06-05 22:07:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:06,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020056527] [2021-06-05 22:07:06,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020056527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692987705] [2021-06-05 22:07:06,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:06,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:06,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:06,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:06,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692987705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:06,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:06,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:07:06,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686892956] [2021-06-05 22:07:06,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:06,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:06,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:06,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:06,255 INFO L87 Difference]: Start difference. First operand 849 states and 2913 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:06,609 INFO L93 Difference]: Finished difference Result 1219 states and 3951 transitions. [2021-06-05 22:07:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:06,611 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 22:07:06,611 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 22:07:06,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 22:07:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 848. [2021-06-05 22:07:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.436835891381346) internal successors, (2911), 847 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2911 transitions. [2021-06-05 22:07:06,622 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2911 transitions. Word has length 20 [2021-06-05 22:07:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:06,622 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2911 transitions. [2021-06-05 22:07:06,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2911 transitions. [2021-06-05 22:07:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:06,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:06,623 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:06,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:06,823 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1518069662, now seen corresponding path program 401 times [2021-06-05 22:07:06,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:06,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317095808] [2021-06-05 22:07:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:06,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:06,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317095808] [2021-06-05 22:07:06,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317095808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:06,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017762268] [2021-06-05 22:07:06,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:07,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:07,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:07,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:07,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017762268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:07,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:07,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:07:07,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383232401] [2021-06-05 22:07:07,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:07,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:07,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:07,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:07,128 INFO L87 Difference]: Start difference. First operand 848 states and 2911 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:07,554 INFO L93 Difference]: Finished difference Result 1239 states and 3990 transitions. [2021-06-05 22:07:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:07,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:07,555 INFO L225 Difference]: With dead ends: 1239 [2021-06-05 22:07:07,555 INFO L226 Difference]: Without dead ends: 1239 [2021-06-05 22:07:07,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:07,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-06-05 22:07:07,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 847. [2021-06-05 22:07:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.434988179669031) internal successors, (2906), 846 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2906 transitions. [2021-06-05 22:07:07,566 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2906 transitions. Word has length 20 [2021-06-05 22:07:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:07,566 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2906 transitions. [2021-06-05 22:07:07,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2906 transitions. [2021-06-05 22:07:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:07,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:07,567 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:07,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4758,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:07,768 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1152559866, now seen corresponding path program 402 times [2021-06-05 22:07:07,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:07,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776746240] [2021-06-05 22:07:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:07,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:07,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776746240] [2021-06-05 22:07:07,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776746240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:07,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783772412] [2021-06-05 22:07:07,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:07,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:07,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:07,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:08,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783772412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:08,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:08,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:07:08,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076297159] [2021-06-05 22:07:08,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:08,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:08,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:08,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:08,068 INFO L87 Difference]: Start difference. First operand 847 states and 2906 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:08,479 INFO L93 Difference]: Finished difference Result 1197 states and 3895 transitions. [2021-06-05 22:07:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:08,480 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 22:07:08,480 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 22:07:08,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 22:07:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 830. [2021-06-05 22:07:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-05 22:07:08,490 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-05 22:07:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:08,490 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-05 22:07:08,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-05 22:07:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:08,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:08,491 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:08,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4764 [2021-06-05 22:07:08,692 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:08,692 INFO L82 PathProgramCache]: Analyzing trace with hash 55260776, now seen corresponding path program 403 times [2021-06-05 22:07:08,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:08,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020056744] [2021-06-05 22:07:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:08,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020056744] [2021-06-05 22:07:08,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020056744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126729534] [2021-06-05 22:07:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126729534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:08,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:08,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:07:08,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217268562] [2021-06-05 22:07:08,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:07:08,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:07:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:07:08,884 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:09,115 INFO L93 Difference]: Finished difference Result 1184 states and 3800 transitions. [2021-06-05 22:07:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:09,116 INFO L225 Difference]: With dead ends: 1184 [2021-06-05 22:07:09,116 INFO L226 Difference]: Without dead ends: 1184 [2021-06-05 22:07:09,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-05 22:07:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 835. [2021-06-05 22:07:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.4268585131894485) internal successors, (2858), 834 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2858 transitions. [2021-06-05 22:07:09,126 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2858 transitions. Word has length 20 [2021-06-05 22:07:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:09,126 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2858 transitions. [2021-06-05 22:07:09,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2858 transitions. [2021-06-05 22:07:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:09,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:09,127 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:09,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4770 [2021-06-05 22:07:09,328 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:09,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1613471838, now seen corresponding path program 404 times [2021-06-05 22:07:09,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:09,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587866976] [2021-06-05 22:07:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:09,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:09,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587866976] [2021-06-05 22:07:09,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587866976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:09,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619989099] [2021-06-05 22:07:09,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:09,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:09,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:09,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:09,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619989099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:09,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:09,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:07:09,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062805608] [2021-06-05 22:07:09,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:07:09,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:07:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:07:09,536 INFO L87 Difference]: Start difference. First operand 835 states and 2858 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:09,872 INFO L93 Difference]: Finished difference Result 1264 states and 4000 transitions. [2021-06-05 22:07:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:09,874 INFO L225 Difference]: With dead ends: 1264 [2021-06-05 22:07:09,874 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 22:07:09,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 22:07:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 838. [2021-06-05 22:07:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4241338112305852) internal successors, (2866), 837 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2866 transitions. [2021-06-05 22:07:09,884 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2866 transitions. Word has length 20 [2021-06-05 22:07:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:09,884 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2866 transitions. [2021-06-05 22:07:09,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2866 transitions. [2021-06-05 22:07:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:09,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:09,885 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:10,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4772 [2021-06-05 22:07:10,085 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash 827417818, now seen corresponding path program 405 times [2021-06-05 22:07:10,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:10,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979501654] [2021-06-05 22:07:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:10,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979501654] [2021-06-05 22:07:10,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979501654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432353599] [2021-06-05 22:07:10,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:10,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:10,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:10,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:10,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432353599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:10,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:10,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408596075] [2021-06-05 22:07:10,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:10,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:10,336 INFO L87 Difference]: Start difference. First operand 838 states and 2866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:10,603 INFO L93 Difference]: Finished difference Result 1151 states and 3695 transitions. [2021-06-05 22:07:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:10,604 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:10,605 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 22:07:10,605 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 22:07:10,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 22:07:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 851. [2021-06-05 22:07:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.418823529411765) internal successors, (2906), 850 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2906 transitions. [2021-06-05 22:07:10,615 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2906 transitions. Word has length 20 [2021-06-05 22:07:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:10,615 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2906 transitions. [2021-06-05 22:07:10,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2906 transitions. [2021-06-05 22:07:10,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:10,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:10,616 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:10,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4775,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:10,817 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1973137240, now seen corresponding path program 406 times [2021-06-05 22:07:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:10,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738319333] [2021-06-05 22:07:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:10,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:10,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738319333] [2021-06-05 22:07:10,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738319333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:10,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385029776] [2021-06-05 22:07:10,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:10,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:10,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:10,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:11,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385029776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:11,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:11,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:07:11,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546069503] [2021-06-05 22:07:11,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:07:11,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:11,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:07:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:07:11,025 INFO L87 Difference]: Start difference. First operand 851 states and 2906 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:11,649 INFO L93 Difference]: Finished difference Result 1375 states and 4282 transitions. [2021-06-05 22:07:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:07:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:11,651 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 22:07:11,651 INFO L226 Difference]: Without dead ends: 1375 [2021-06-05 22:07:11,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 534.0ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:07:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-05 22:07:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 851. [2021-06-05 22:07:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.418823529411765) internal successors, (2906), 850 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2906 transitions. [2021-06-05 22:07:11,662 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2906 transitions. Word has length 20 [2021-06-05 22:07:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:11,662 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2906 transitions. [2021-06-05 22:07:11,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2906 transitions. [2021-06-05 22:07:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:11,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:11,663 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:11,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4781 [2021-06-05 22:07:11,863 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash 827922334, now seen corresponding path program 407 times [2021-06-05 22:07:11,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:11,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321233395] [2021-06-05 22:07:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:11,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:11,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321233395] [2021-06-05 22:07:11,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321233395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624968675] [2021-06-05 22:07:11,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:12,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:12,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:12,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:12,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:12,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624968675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:12,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:12,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:07:12,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063482035] [2021-06-05 22:07:12,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:07:12,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:07:12,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:07:12,069 INFO L87 Difference]: Start difference. First operand 851 states and 2906 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:12,386 INFO L93 Difference]: Finished difference Result 1253 states and 3969 transitions. [2021-06-05 22:07:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:12,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:12,388 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 22:07:12,388 INFO L226 Difference]: Without dead ends: 1247 [2021-06-05 22:07:12,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-05 22:07:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 851. [2021-06-05 22:07:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.415294117647059) internal successors, (2903), 850 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2903 transitions. [2021-06-05 22:07:12,399 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2903 transitions. Word has length 20 [2021-06-05 22:07:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:12,399 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2903 transitions. [2021-06-05 22:07:12,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2903 transitions. [2021-06-05 22:07:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:12,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:12,400 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:12,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4786,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:12,600 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:12,600 INFO L82 PathProgramCache]: Analyzing trace with hash -613020500, now seen corresponding path program 408 times [2021-06-05 22:07:12,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:12,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470735310] [2021-06-05 22:07:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:12,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:12,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470735310] [2021-06-05 22:07:12,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470735310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:12,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031769905] [2021-06-05 22:07:12,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:12,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:12,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:12,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:12,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031769905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:12,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:12,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:12,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428137111] [2021-06-05 22:07:12,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:12,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:12,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:12,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:12,844 INFO L87 Difference]: Start difference. First operand 851 states and 2903 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:13,026 INFO L93 Difference]: Finished difference Result 1114 states and 3618 transitions. [2021-06-05 22:07:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:07:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:13,028 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 22:07:13,028 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 22:07:13,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 22:07:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 830. [2021-06-05 22:07:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-05 22:07:13,037 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-05 22:07:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:13,037 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-05 22:07:13,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-05 22:07:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:13,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:13,038 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:13,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4790 [2021-06-05 22:07:13,238 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:13,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1170572698, now seen corresponding path program 409 times [2021-06-05 22:07:13,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:13,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044474850] [2021-06-05 22:07:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:13,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:13,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044474850] [2021-06-05 22:07:13,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044474850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:13,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560922726] [2021-06-05 22:07:13,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:13,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:13,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:13,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560922726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:13,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:13,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:07:13,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808442334] [2021-06-05 22:07:13,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:07:13,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:07:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:07:13,446 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:13,657 INFO L93 Difference]: Finished difference Result 1119 states and 3616 transitions. [2021-06-05 22:07:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:13,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:13,659 INFO L225 Difference]: With dead ends: 1119 [2021-06-05 22:07:13,659 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 22:07:13,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:07:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 22:07:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 833. [2021-06-05 22:07:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4290865384615383) internal successors, (2853), 832 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2853 transitions. [2021-06-05 22:07:13,668 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2853 transitions. Word has length 20 [2021-06-05 22:07:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:13,668 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2853 transitions. [2021-06-05 22:07:13,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2853 transitions. [2021-06-05 22:07:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:13,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:13,669 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:13,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4797,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:13,870 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1878930916, now seen corresponding path program 410 times [2021-06-05 22:07:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:13,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419754506] [2021-06-05 22:07:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:13,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:13,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419754506] [2021-06-05 22:07:13,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419754506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:13,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167940480] [2021-06-05 22:07:13,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:14,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:14,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:14,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167940480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:14,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:14,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:07:14,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625996932] [2021-06-05 22:07:14,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:07:14,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:14,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:07:14,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:07:14,110 INFO L87 Difference]: Start difference. First operand 833 states and 2853 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:14,420 INFO L93 Difference]: Finished difference Result 1161 states and 3742 transitions. [2021-06-05 22:07:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:14,422 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 22:07:14,422 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 22:07:14,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 22:07:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 830. [2021-06-05 22:07:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-05 22:07:14,431 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-05 22:07:14,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:14,431 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-05 22:07:14,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:14,431 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-05 22:07:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:14,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:14,432 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:14,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:14,633 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash -227853204, now seen corresponding path program 411 times [2021-06-05 22:07:14,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:14,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128619957] [2021-06-05 22:07:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:14,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:14,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128619957] [2021-06-05 22:07:14,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128619957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:14,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695705885] [2021-06-05 22:07:14,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:14,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:14,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:14,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:14,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695705885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:14,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:14,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:07:14,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262155048] [2021-06-05 22:07:14,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:07:14,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:14,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:07:14,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:07:14,857 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:15,096 INFO L93 Difference]: Finished difference Result 1144 states and 3661 transitions. [2021-06-05 22:07:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:15,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:15,097 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 22:07:15,098 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 22:07:15,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 22:07:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 830. [2021-06-05 22:07:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-05 22:07:15,107 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-05 22:07:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:15,107 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-05 22:07:15,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-05 22:07:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:15,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:15,108 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:15,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4806,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:15,308 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1183905348, now seen corresponding path program 412 times [2021-06-05 22:07:15,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:15,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331964831] [2021-06-05 22:07:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:15,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331964831] [2021-06-05 22:07:15,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331964831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097756786] [2021-06-05 22:07:15,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:15,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:15,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:15,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:15,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097756786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:15,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:15,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:07:15,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006261524] [2021-06-05 22:07:15,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:07:15,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:15,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:07:15,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:07:15,535 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:15,818 INFO L93 Difference]: Finished difference Result 1029 states and 3385 transitions. [2021-06-05 22:07:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:15,820 INFO L225 Difference]: With dead ends: 1029 [2021-06-05 22:07:15,820 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 22:07:15,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:15,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 22:07:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 819. [2021-06-05 22:07:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4388753056234718) internal successors, (2813), 818 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2813 transitions. [2021-06-05 22:07:15,828 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2813 transitions. Word has length 20 [2021-06-05 22:07:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:15,829 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2813 transitions. [2021-06-05 22:07:15,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2813 transitions. [2021-06-05 22:07:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:15,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:15,829 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:16,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4811 [2021-06-05 22:07:16,030 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:16,030 INFO L82 PathProgramCache]: Analyzing trace with hash -343837518, now seen corresponding path program 413 times [2021-06-05 22:07:16,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:16,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887622351] [2021-06-05 22:07:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:16,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:16,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887622351] [2021-06-05 22:07:16,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887622351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:16,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441107888] [2021-06-05 22:07:16,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:16,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:16,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:16,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441107888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:16,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:16,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:07:16,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759853988] [2021-06-05 22:07:16,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:07:16,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:07:16,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:07:16,243 INFO L87 Difference]: Start difference. First operand 819 states and 2813 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:16,523 INFO L93 Difference]: Finished difference Result 1469 states and 4603 transitions. [2021-06-05 22:07:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:16,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:16,525 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 22:07:16,525 INFO L226 Difference]: Without dead ends: 1469 [2021-06-05 22:07:16,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-05 22:07:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 826. [2021-06-05 22:07:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.443636363636364) internal successors, (2841), 825 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2841 transitions. [2021-06-05 22:07:16,536 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2841 transitions. Word has length 20 [2021-06-05 22:07:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:16,536 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2841 transitions. [2021-06-05 22:07:16,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2841 transitions. [2021-06-05 22:07:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:16,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:16,537 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:16,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4818,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:16,738 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1214373544, now seen corresponding path program 414 times [2021-06-05 22:07:16,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:16,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976235393] [2021-06-05 22:07:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:16,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:16,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976235393] [2021-06-05 22:07:16,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976235393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:16,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592521064] [2021-06-05 22:07:16,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:16,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:16,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:16,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592521064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:16,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:16,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:16,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919064554] [2021-06-05 22:07:16,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:16,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:16,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:16,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:16,991 INFO L87 Difference]: Start difference. First operand 826 states and 2841 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:17,510 INFO L93 Difference]: Finished difference Result 1609 states and 4942 transitions. [2021-06-05 22:07:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:07:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:17,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:17,512 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 22:07:17,512 INFO L226 Difference]: Without dead ends: 1609 [2021-06-05 22:07:17,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:07:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-06-05 22:07:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 832. [2021-06-05 22:07:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.441636582430806) internal successors, (2860), 831 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2860 transitions. [2021-06-05 22:07:17,523 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2860 transitions. Word has length 20 [2021-06-05 22:07:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:17,523 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2860 transitions. [2021-06-05 22:07:17,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2860 transitions. [2021-06-05 22:07:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:17,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:17,524 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:17,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4822,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:17,725 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:17,725 INFO L82 PathProgramCache]: Analyzing trace with hash 428319524, now seen corresponding path program 415 times [2021-06-05 22:07:17,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:17,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732997679] [2021-06-05 22:07:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:17,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:17,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732997679] [2021-06-05 22:07:17,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732997679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:17,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050818863] [2021-06-05 22:07:17,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:18,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050818863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:18,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:18,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:18,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204025785] [2021-06-05 22:07:18,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:18,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:18,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:18,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:18,017 INFO L87 Difference]: Start difference. First operand 832 states and 2860 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:18,475 INFO L93 Difference]: Finished difference Result 1334 states and 4217 transitions. [2021-06-05 22:07:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:18,477 INFO L225 Difference]: With dead ends: 1334 [2021-06-05 22:07:18,477 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 22:07:18,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 22:07:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 845. [2021-06-05 22:07:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.4360189573459716) internal successors, (2900), 844 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2900 transitions. [2021-06-05 22:07:18,487 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2900 transitions. Word has length 20 [2021-06-05 22:07:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:18,488 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2900 transitions. [2021-06-05 22:07:18,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2900 transitions. [2021-06-05 22:07:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:18,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:18,489 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:18,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4827 [2021-06-05 22:07:18,689 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1922731762, now seen corresponding path program 416 times [2021-06-05 22:07:18,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:18,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213886203] [2021-06-05 22:07:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:18,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:18,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213886203] [2021-06-05 22:07:18,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213886203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:18,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073447560] [2021-06-05 22:07:18,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:18,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:18,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:18,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:18,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:18,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073447560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:18,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:18,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:18,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297710865] [2021-06-05 22:07:18,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:18,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:18,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:18,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:18,958 INFO L87 Difference]: Start difference. First operand 845 states and 2900 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:19,887 INFO L93 Difference]: Finished difference Result 1808 states and 5449 transitions. [2021-06-05 22:07:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:07:19,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:19,889 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 22:07:19,890 INFO L226 Difference]: Without dead ends: 1808 [2021-06-05 22:07:19,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:07:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-06-05 22:07:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 848. [2021-06-05 22:07:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.4403778040141675) internal successors, (2914), 847 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2914 transitions. [2021-06-05 22:07:19,902 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2914 transitions. Word has length 20 [2021-06-05 22:07:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:19,903 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2914 transitions. [2021-06-05 22:07:19,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2914 transitions. [2021-06-05 22:07:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:19,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:19,904 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:20,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4836 [2021-06-05 22:07:20,104 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash 428824040, now seen corresponding path program 417 times [2021-06-05 22:07:20,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:20,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49944766] [2021-06-05 22:07:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:20,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:20,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49944766] [2021-06-05 22:07:20,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49944766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:20,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448481329] [2021-06-05 22:07:20,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:20,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:20,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448481329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:20,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:20,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310510806] [2021-06-05 22:07:20,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:20,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:20,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:20,347 INFO L87 Difference]: Start difference. First operand 848 states and 2914 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:20,697 INFO L93 Difference]: Finished difference Result 1465 states and 4586 transitions. [2021-06-05 22:07:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:20,699 INFO L225 Difference]: With dead ends: 1465 [2021-06-05 22:07:20,699 INFO L226 Difference]: Without dead ends: 1459 [2021-06-05 22:07:20,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-05 22:07:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 854. [2021-06-05 22:07:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4279015240328254) internal successors, (2924), 853 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2924 transitions. [2021-06-05 22:07:20,710 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2924 transitions. Word has length 20 [2021-06-05 22:07:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:20,710 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2924 transitions. [2021-06-05 22:07:20,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2924 transitions. [2021-06-05 22:07:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:20,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:20,711 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:20,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4844,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:20,911 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1012118794, now seen corresponding path program 418 times [2021-06-05 22:07:20,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:20,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522279670] [2021-06-05 22:07:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:20,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522279670] [2021-06-05 22:07:20,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522279670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433360578] [2021-06-05 22:07:20,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:21,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:21,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:21,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:21,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:21,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433360578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:21,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:21,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:21,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592739961] [2021-06-05 22:07:21,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:21,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:21,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:21,193 INFO L87 Difference]: Start difference. First operand 854 states and 2924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:21,523 INFO L93 Difference]: Finished difference Result 1306 states and 4167 transitions. [2021-06-05 22:07:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:07:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:21,524 INFO L225 Difference]: With dead ends: 1306 [2021-06-05 22:07:21,524 INFO L226 Difference]: Without dead ends: 1306 [2021-06-05 22:07:21,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-06-05 22:07:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 833. [2021-06-05 22:07:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4447115384615383) internal successors, (2866), 832 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2866 transitions. [2021-06-05 22:07:21,534 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2866 transitions. Word has length 20 [2021-06-05 22:07:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:21,534 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2866 transitions. [2021-06-05 22:07:21,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2866 transitions. [2021-06-05 22:07:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:21,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:21,535 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:21,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4852,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:21,736 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:21,736 INFO L82 PathProgramCache]: Analyzing trace with hash -120644928, now seen corresponding path program 419 times [2021-06-05 22:07:21,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:21,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258098816] [2021-06-05 22:07:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:21,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:21,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258098816] [2021-06-05 22:07:21,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258098816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:21,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31127515] [2021-06-05 22:07:21,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:21,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:21,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:21,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:21,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:22,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31127515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:22,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:22,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:22,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946995226] [2021-06-05 22:07:22,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:22,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:22,008 INFO L87 Difference]: Start difference. First operand 833 states and 2866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:22,294 INFO L93 Difference]: Finished difference Result 1229 states and 3953 transitions. [2021-06-05 22:07:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:07:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:22,296 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 22:07:22,296 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 22:07:22,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 22:07:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 829. [2021-06-05 22:07:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4444444444444446) internal successors, (2852), 828 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2852 transitions. [2021-06-05 22:07:22,306 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2852 transitions. Word has length 20 [2021-06-05 22:07:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:22,306 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2852 transitions. [2021-06-05 22:07:22,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2852 transitions. [2021-06-05 22:07:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:22,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:22,307 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:22,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4859 [2021-06-05 22:07:22,507 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash 197477672, now seen corresponding path program 420 times [2021-06-05 22:07:22,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:22,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773175966] [2021-06-05 22:07:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:22,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:22,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773175966] [2021-06-05 22:07:22,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773175966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:22,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986013807] [2021-06-05 22:07:22,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:22,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:22,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:22,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:22,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986013807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:22,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:22,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933815270] [2021-06-05 22:07:22,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:22,754 INFO L87 Difference]: Start difference. First operand 829 states and 2852 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:23,028 INFO L93 Difference]: Finished difference Result 1475 states and 4621 transitions. [2021-06-05 22:07:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:23,030 INFO L225 Difference]: With dead ends: 1475 [2021-06-05 22:07:23,030 INFO L226 Difference]: Without dead ends: 1475 [2021-06-05 22:07:23,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-05 22:07:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 816. [2021-06-05 22:07:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.4478527607361964) internal successors, (2810), 815 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2810 transitions. [2021-06-05 22:07:23,040 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2810 transitions. Word has length 20 [2021-06-05 22:07:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:23,040 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2810 transitions. [2021-06-05 22:07:23,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2810 transitions. [2021-06-05 22:07:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:23,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:23,041 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:23,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4866,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:23,242 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash -717536728, now seen corresponding path program 421 times [2021-06-05 22:07:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:23,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816423952] [2021-06-05 22:07:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:23,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:23,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816423952] [2021-06-05 22:07:23,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816423952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:23,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520087436] [2021-06-05 22:07:23,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:23,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520087436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:23,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:23,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:23,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491704050] [2021-06-05 22:07:23,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:23,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:23,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:23,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:23,492 INFO L87 Difference]: Start difference. First operand 816 states and 2810 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:23,757 INFO L93 Difference]: Finished difference Result 1396 states and 4422 transitions. [2021-06-05 22:07:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:23,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:23,759 INFO L225 Difference]: With dead ends: 1396 [2021-06-05 22:07:23,759 INFO L226 Difference]: Without dead ends: 1396 [2021-06-05 22:07:23,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:23,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-06-05 22:07:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 819. [2021-06-05 22:07:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4535452322738385) internal successors, (2825), 818 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2825 transitions. [2021-06-05 22:07:23,769 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2825 transitions. Word has length 20 [2021-06-05 22:07:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:23,769 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2825 transitions. [2021-06-05 22:07:23,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2825 transitions. [2021-06-05 22:07:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:23,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:23,770 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:23,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4870,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:23,971 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1484382876, now seen corresponding path program 422 times [2021-06-05 22:07:23,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:23,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695780252] [2021-06-05 22:07:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:24,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:24,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695780252] [2021-06-05 22:07:24,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695780252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:24,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780091317] [2021-06-05 22:07:24,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:24,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:24,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:24,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:24,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:24,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780091317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:24,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:24,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:24,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301691280] [2021-06-05 22:07:24,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:24,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:24,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:24,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:24,253 INFO L87 Difference]: Start difference. First operand 819 states and 2825 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:24,609 INFO L93 Difference]: Finished difference Result 1428 states and 4503 transitions. [2021-06-05 22:07:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:24,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:24,611 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 22:07:24,611 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 22:07:24,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 22:07:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 820. [2021-06-05 22:07:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.456654456654457) internal successors, (2831), 819 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2831 transitions. [2021-06-05 22:07:24,622 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2831 transitions. Word has length 20 [2021-06-05 22:07:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:24,622 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2831 transitions. [2021-06-05 22:07:24,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2831 transitions. [2021-06-05 22:07:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:24,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:24,623 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:24,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:24,823 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 853447464, now seen corresponding path program 423 times [2021-06-05 22:07:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:24,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204732418] [2021-06-05 22:07:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:24,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:24,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204732418] [2021-06-05 22:07:24,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204732418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:24,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540216490] [2021-06-05 22:07:24,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:24,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:24,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:25,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540216490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:25,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:25,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:25,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417148936] [2021-06-05 22:07:25,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:25,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:25,095 INFO L87 Difference]: Start difference. First operand 820 states and 2831 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:25,385 INFO L93 Difference]: Finished difference Result 1395 states and 4426 transitions. [2021-06-05 22:07:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:25,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:25,387 INFO L225 Difference]: With dead ends: 1395 [2021-06-05 22:07:25,387 INFO L226 Difference]: Without dead ends: 1395 [2021-06-05 22:07:25,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-05 22:07:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 810. [2021-06-05 22:07:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4437577255871448) internal successors, (2786), 809 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2786 transitions. [2021-06-05 22:07:25,397 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2786 transitions. Word has length 20 [2021-06-05 22:07:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:25,397 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2786 transitions. [2021-06-05 22:07:25,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2786 transitions. [2021-06-05 22:07:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:25,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:25,398 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:25,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4881 [2021-06-05 22:07:25,599 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:25,599 INFO L82 PathProgramCache]: Analyzing trace with hash 43506906, now seen corresponding path program 424 times [2021-06-05 22:07:25,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:25,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282955175] [2021-06-05 22:07:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:25,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282955175] [2021-06-05 22:07:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282955175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313530446] [2021-06-05 22:07:25,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:25,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:25,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:25,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:25,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313530446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:25,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:25,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:25,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274922299] [2021-06-05 22:07:25,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:25,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:25,869 INFO L87 Difference]: Start difference. First operand 810 states and 2786 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:26,369 INFO L93 Difference]: Finished difference Result 1537 states and 4757 transitions. [2021-06-05 22:07:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:07:26,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:26,371 INFO L225 Difference]: With dead ends: 1537 [2021-06-05 22:07:26,371 INFO L226 Difference]: Without dead ends: 1537 [2021-06-05 22:07:26,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:07:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-06-05 22:07:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 814. [2021-06-05 22:07:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4477244772447726) internal successors, (2803), 813 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2803 transitions. [2021-06-05 22:07:26,382 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2803 transitions. Word has length 20 [2021-06-05 22:07:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:26,382 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2803 transitions. [2021-06-05 22:07:26,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2803 transitions. [2021-06-05 22:07:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:26,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:26,383 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:26,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:26,583 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:26,583 INFO L82 PathProgramCache]: Analyzing trace with hash -742547114, now seen corresponding path program 425 times [2021-06-05 22:07:26,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:26,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330209303] [2021-06-05 22:07:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:26,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:26,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330209303] [2021-06-05 22:07:26,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330209303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:26,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815820463] [2021-06-05 22:07:26,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:26,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:26,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:26,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815820463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:26,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:26,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:26,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77025498] [2021-06-05 22:07:26,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:26,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:26,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:26,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:26,896 INFO L87 Difference]: Start difference. First operand 814 states and 2803 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:27,399 INFO L93 Difference]: Finished difference Result 1337 states and 4202 transitions. [2021-06-05 22:07:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:27,401 INFO L225 Difference]: With dead ends: 1337 [2021-06-05 22:07:27,401 INFO L226 Difference]: Without dead ends: 1330 [2021-06-05 22:07:27,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-06-05 22:07:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 827. [2021-06-05 22:07:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.4418886198547214) internal successors, (2843), 826 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2843 transitions. [2021-06-05 22:07:27,412 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2843 transitions. Word has length 20 [2021-06-05 22:07:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:27,412 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2843 transitions. [2021-06-05 22:07:27,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2843 transitions. [2021-06-05 22:07:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:27,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:27,413 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:27,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4893 [2021-06-05 22:07:27,613 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:27,614 INFO L82 PathProgramCache]: Analyzing trace with hash 751865124, now seen corresponding path program 426 times [2021-06-05 22:07:27,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:27,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775168324] [2021-06-05 22:07:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:27,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:27,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775168324] [2021-06-05 22:07:27,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775168324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:27,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340746429] [2021-06-05 22:07:27,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:27,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:27,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:27,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:27,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340746429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:27,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:27,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:27,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583707827] [2021-06-05 22:07:27,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:27,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:27,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:27,876 INFO L87 Difference]: Start difference. First operand 827 states and 2843 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:28,643 INFO L93 Difference]: Finished difference Result 1650 states and 5058 transitions. [2021-06-05 22:07:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:07:28,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:28,645 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 22:07:28,645 INFO L226 Difference]: Without dead ends: 1650 [2021-06-05 22:07:28,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 683.7ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:07:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-05 22:07:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 830. [2021-06-05 22:07:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4463208685162847) internal successors, (2857), 829 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2857 transitions. [2021-06-05 22:07:28,657 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2857 transitions. Word has length 20 [2021-06-05 22:07:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:28,657 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2857 transitions. [2021-06-05 22:07:28,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2857 transitions. [2021-06-05 22:07:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:28,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:28,658 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:28,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4902 [2021-06-05 22:07:28,859 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:28,859 INFO L82 PathProgramCache]: Analyzing trace with hash -742042598, now seen corresponding path program 427 times [2021-06-05 22:07:28,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:28,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547234014] [2021-06-05 22:07:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:28,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:28,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547234014] [2021-06-05 22:07:28,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547234014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:28,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990093542] [2021-06-05 22:07:28,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:29,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:29,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990093542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:29,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:29,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:29,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870470359] [2021-06-05 22:07:29,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:29,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:29,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:29,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:29,118 INFO L87 Difference]: Start difference. First operand 830 states and 2857 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:29,438 INFO L93 Difference]: Finished difference Result 1375 states and 4358 transitions. [2021-06-05 22:07:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:29,438 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:29,440 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 22:07:29,440 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 22:07:29,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 22:07:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 836. [2021-06-05 22:07:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.4335329341317364) internal successors, (2867), 835 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2867 transitions. [2021-06-05 22:07:29,450 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2867 transitions. Word has length 20 [2021-06-05 22:07:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:29,451 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2867 transitions. [2021-06-05 22:07:29,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2867 transitions. [2021-06-05 22:07:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:29,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:29,452 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:29,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-06-05 22:07:29,652 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2111981864, now seen corresponding path program 428 times [2021-06-05 22:07:29,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:29,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733520520] [2021-06-05 22:07:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:29,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:29,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733520520] [2021-06-05 22:07:29,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733520520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:29,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108223698] [2021-06-05 22:07:29,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:29,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:29,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108223698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:29,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:29,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:29,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867200700] [2021-06-05 22:07:29,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:29,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:29,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:29,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:29,995 INFO L87 Difference]: Start difference. First operand 836 states and 2867 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:30,257 INFO L93 Difference]: Finished difference Result 1262 states and 4041 transitions. [2021-06-05 22:07:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:30,259 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 22:07:30,259 INFO L226 Difference]: Without dead ends: 1262 [2021-06-05 22:07:30,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-06-05 22:07:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 820. [2021-06-05 22:07:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-05 22:07:30,269 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-05 22:07:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:30,269 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-05 22:07:30,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-05 22:07:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:30,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:30,270 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:30,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4916 [2021-06-05 22:07:30,470 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1418132912, now seen corresponding path program 429 times [2021-06-05 22:07:30,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:30,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607099691] [2021-06-05 22:07:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:30,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:30,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607099691] [2021-06-05 22:07:30,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607099691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:30,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476633649] [2021-06-05 22:07:30,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:30,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:30,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:30,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:30,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476633649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:30,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:30,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:30,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761401184] [2021-06-05 22:07:30,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:30,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:30,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:30,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:30,763 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:31,078 INFO L93 Difference]: Finished difference Result 1233 states and 3969 transitions. [2021-06-05 22:07:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:31,080 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 22:07:31,080 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 22:07:31,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 22:07:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 820. [2021-06-05 22:07:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-05 22:07:31,090 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-05 22:07:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:31,090 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-05 22:07:31,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-05 22:07:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:31,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:31,091 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:31,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4925 [2021-06-05 22:07:31,291 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1862084004, now seen corresponding path program 430 times [2021-06-05 22:07:31,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:31,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101134419] [2021-06-05 22:07:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:31,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:31,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101134419] [2021-06-05 22:07:31,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101134419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:31,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987958815] [2021-06-05 22:07:31,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:31,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:31,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:31,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:31,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:31,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987958815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:31,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:31,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:31,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626920814] [2021-06-05 22:07:31,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:31,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:31,557 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:31,925 INFO L93 Difference]: Finished difference Result 1444 states and 4536 transitions. [2021-06-05 22:07:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:31,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:31,927 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 22:07:31,927 INFO L226 Difference]: Without dead ends: 1444 [2021-06-05 22:07:31,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-06-05 22:07:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 810. [2021-06-05 22:07:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.452410383189122) internal successors, (2793), 809 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2793 transitions. [2021-06-05 22:07:31,937 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2793 transitions. Word has length 20 [2021-06-05 22:07:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:31,937 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2793 transitions. [2021-06-05 22:07:31,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2793 transitions. [2021-06-05 22:07:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:31,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:31,938 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:32,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4933,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:32,138 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:32,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1250117212, now seen corresponding path program 431 times [2021-06-05 22:07:32,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:32,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488521635] [2021-06-05 22:07:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:32,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:32,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488521635] [2021-06-05 22:07:32,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488521635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:32,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604265172] [2021-06-05 22:07:32,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:32,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:32,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:32,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:32,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604265172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:32,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:32,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:32,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530295897] [2021-06-05 22:07:32,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:32,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:32,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:32,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:32,449 INFO L87 Difference]: Start difference. First operand 810 states and 2793 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:32,949 INFO L93 Difference]: Finished difference Result 1475 states and 4621 transitions. [2021-06-05 22:07:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:32,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:32,951 INFO L225 Difference]: With dead ends: 1475 [2021-06-05 22:07:32,951 INFO L226 Difference]: Without dead ends: 1475 [2021-06-05 22:07:32,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-05 22:07:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 811. [2021-06-05 22:07:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.4555555555555557) internal successors, (2799), 810 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2799 transitions. [2021-06-05 22:07:32,962 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2799 transitions. Word has length 20 [2021-06-05 22:07:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:32,962 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2799 transitions. [2021-06-05 22:07:32,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2799 transitions. [2021-06-05 22:07:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:32,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:32,963 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:33,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4938,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:33,177 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1087713128, now seen corresponding path program 432 times [2021-06-05 22:07:33,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:33,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51132406] [2021-06-05 22:07:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:33,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:33,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51132406] [2021-06-05 22:07:33,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51132406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:33,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961523129] [2021-06-05 22:07:33,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:33,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:33,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:33,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:33,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961523129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:33,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:33,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:33,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76100290] [2021-06-05 22:07:33,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:33,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:33,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:33,441 INFO L87 Difference]: Start difference. First operand 811 states and 2799 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:33,813 INFO L93 Difference]: Finished difference Result 1432 states and 4518 transitions. [2021-06-05 22:07:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:33,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:33,815 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 22:07:33,815 INFO L226 Difference]: Without dead ends: 1432 [2021-06-05 22:07:33,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-05 22:07:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 807. [2021-06-05 22:07:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.446650124069479) internal successors, (2778), 806 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:33,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2778 transitions. [2021-06-05 22:07:33,825 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2778 transitions. Word has length 20 [2021-06-05 22:07:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:33,825 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2778 transitions. [2021-06-05 22:07:33,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2778 transitions. [2021-06-05 22:07:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:33,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:33,826 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:34,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4945 [2021-06-05 22:07:34,026 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:34,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:34,027 INFO L82 PathProgramCache]: Analyzing trace with hash 688471976, now seen corresponding path program 433 times [2021-06-05 22:07:34,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:34,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294325133] [2021-06-05 22:07:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:34,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:34,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294325133] [2021-06-05 22:07:34,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294325133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:34,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481200643] [2021-06-05 22:07:34,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:34,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:34,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481200643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:34,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:34,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:34,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859073809] [2021-06-05 22:07:34,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:34,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:34,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:34,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:34,310 INFO L87 Difference]: Start difference. First operand 807 states and 2778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:34,814 INFO L93 Difference]: Finished difference Result 1355 states and 4261 transitions. [2021-06-05 22:07:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:34,816 INFO L225 Difference]: With dead ends: 1355 [2021-06-05 22:07:34,816 INFO L226 Difference]: Without dead ends: 1348 [2021-06-05 22:07:34,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-05 22:07:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 822. [2021-06-05 22:07:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.4470158343483557) internal successors, (2830), 821 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2830 transitions. [2021-06-05 22:07:34,827 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2830 transitions. Word has length 20 [2021-06-05 22:07:34,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:34,827 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2830 transitions. [2021-06-05 22:07:34,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2830 transitions. [2021-06-05 22:07:34,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:34,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:34,828 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:35,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4952,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:35,028 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:35,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2112083082, now seen corresponding path program 434 times [2021-06-05 22:07:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:35,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800691552] [2021-06-05 22:07:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:35,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800691552] [2021-06-05 22:07:35,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800691552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532558435] [2021-06-05 22:07:35,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:35,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:35,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:35,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:35,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532558435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:35,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:35,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:35,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155852399] [2021-06-05 22:07:35,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:35,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:35,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:35,297 INFO L87 Difference]: Start difference. First operand 822 states and 2830 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:36,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:36,321 INFO L93 Difference]: Finished difference Result 1686 states and 5138 transitions. [2021-06-05 22:07:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:07:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:36,323 INFO L225 Difference]: With dead ends: 1686 [2021-06-05 22:07:36,323 INFO L226 Difference]: Without dead ends: 1686 [2021-06-05 22:07:36,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 936.5ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:07:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-06-05 22:07:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 826. [2021-06-05 22:07:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.4545454545454546) internal successors, (2850), 825 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2850 transitions. [2021-06-05 22:07:36,335 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2850 transitions. Word has length 20 [2021-06-05 22:07:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:36,335 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2850 transitions. [2021-06-05 22:07:36,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2850 transitions. [2021-06-05 22:07:36,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:36,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:36,336 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:36,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4961,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:36,537 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:36,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:36,537 INFO L82 PathProgramCache]: Analyzing trace with hash 688976492, now seen corresponding path program 435 times [2021-06-05 22:07:36,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:36,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816480936] [2021-06-05 22:07:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:36,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:36,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816480936] [2021-06-05 22:07:36,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816480936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:36,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554518965] [2021-06-05 22:07:36,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:36,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:36,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:36,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:36,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554518965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:36,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:36,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:36,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968568888] [2021-06-05 22:07:36,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:36,796 INFO L87 Difference]: Start difference. First operand 826 states and 2850 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:37,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:37,224 INFO L93 Difference]: Finished difference Result 1394 states and 4411 transitions. [2021-06-05 22:07:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:37,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:37,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:37,226 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 22:07:37,226 INFO L226 Difference]: Without dead ends: 1388 [2021-06-05 22:07:37,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:07:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-05 22:07:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 832. [2021-06-05 22:07:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.441636582430806) internal successors, (2860), 831 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2860 transitions. [2021-06-05 22:07:37,236 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2860 transitions. Word has length 20 [2021-06-05 22:07:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:37,236 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2860 transitions. [2021-06-05 22:07:37,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2860 transitions. [2021-06-05 22:07:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:37,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:37,237 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:37,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4969 [2021-06-05 22:07:37,438 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -751966342, now seen corresponding path program 436 times [2021-06-05 22:07:37,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:37,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865667488] [2021-06-05 22:07:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:37,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:37,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865667488] [2021-06-05 22:07:37,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865667488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:37,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248798724] [2021-06-05 22:07:37,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:37,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:37,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:37,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:37,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:37,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248798724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:37,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:37,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:37,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964305674] [2021-06-05 22:07:37,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:37,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:37,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:37,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:37,751 INFO L87 Difference]: Start difference. First operand 832 states and 2860 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:38,239 INFO L93 Difference]: Finished difference Result 1356 states and 4269 transitions. [2021-06-05 22:07:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:38,241 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 22:07:38,241 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 22:07:38,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 22:07:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 829. [2021-06-05 22:07:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4444444444444446) internal successors, (2852), 828 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2852 transitions. [2021-06-05 22:07:38,252 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2852 transitions. Word has length 20 [2021-06-05 22:07:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:38,252 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2852 transitions. [2021-06-05 22:07:38,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2852 transitions. [2021-06-05 22:07:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:38,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:38,253 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:38,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4977,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:38,453 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:38,454 INFO L82 PathProgramCache]: Analyzing trace with hash -496664768, now seen corresponding path program 437 times [2021-06-05 22:07:38,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:38,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631111311] [2021-06-05 22:07:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:38,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631111311] [2021-06-05 22:07:38,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631111311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197973759] [2021-06-05 22:07:38,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:38,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:38,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:38,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:38,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197973759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:38,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:38,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:38,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374232100] [2021-06-05 22:07:38,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:38,768 INFO L87 Difference]: Start difference. First operand 829 states and 2852 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:39,269 INFO L93 Difference]: Finished difference Result 1314 states and 4162 transitions. [2021-06-05 22:07:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:39,271 INFO L225 Difference]: With dead ends: 1314 [2021-06-05 22:07:39,271 INFO L226 Difference]: Without dead ends: 1307 [2021-06-05 22:07:39,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-05 22:07:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 833. [2021-06-05 22:07:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4447115384615383) internal successors, (2866), 832 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2866 transitions. [2021-06-05 22:07:39,282 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2866 transitions. Word has length 20 [2021-06-05 22:07:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:39,282 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2866 transitions. [2021-06-05 22:07:39,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2866 transitions. [2021-06-05 22:07:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:39,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:39,283 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:39,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4993,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:39,483 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1871238056, now seen corresponding path program 438 times [2021-06-05 22:07:39,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:39,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680218066] [2021-06-05 22:07:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:39,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:39,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680218066] [2021-06-05 22:07:39,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680218066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:39,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169672092] [2021-06-05 22:07:39,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:39,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:39,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:39,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:39,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:39,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169672092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:39,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:39,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:39,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771168883] [2021-06-05 22:07:39,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:39,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:39,784 INFO L87 Difference]: Start difference. First operand 833 states and 2866 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:40,220 INFO L93 Difference]: Finished difference Result 1248 states and 4030 transitions. [2021-06-05 22:07:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:40,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:40,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:40,222 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 22:07:40,222 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 22:07:40,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 22:07:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 831. [2021-06-05 22:07:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.446987951807229) internal successors, (2861), 830 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2861 transitions. [2021-06-05 22:07:40,232 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2861 transitions. Word has length 20 [2021-06-05 22:07:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:40,232 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2861 transitions. [2021-06-05 22:07:40,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2861 transitions. [2021-06-05 22:07:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:40,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:40,233 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:40,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5003,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:40,434 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:40,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1360682644, now seen corresponding path program 439 times [2021-06-05 22:07:40,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:40,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231556667] [2021-06-05 22:07:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:40,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:40,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231556667] [2021-06-05 22:07:40,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231556667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:40,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024117826] [2021-06-05 22:07:40,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:40,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024117826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:40,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:40,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:40,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458133225] [2021-06-05 22:07:40,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:40,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:40,703 INFO L87 Difference]: Start difference. First operand 831 states and 2861 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:41,523 INFO L93 Difference]: Finished difference Result 1564 states and 4857 transitions. [2021-06-05 22:07:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:07:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:41,525 INFO L225 Difference]: With dead ends: 1564 [2021-06-05 22:07:41,525 INFO L226 Difference]: Without dead ends: 1564 [2021-06-05 22:07:41,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 740.4ms TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:07:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-06-05 22:07:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 822. [2021-06-05 22:07:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.451887941534714) internal successors, (2834), 821 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2834 transitions. [2021-06-05 22:07:41,536 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2834 transitions. Word has length 20 [2021-06-05 22:07:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:41,537 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2834 transitions. [2021-06-05 22:07:41,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2834 transitions. [2021-06-05 22:07:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:41,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:41,537 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:41,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5010 [2021-06-05 22:07:41,738 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash -68340244, now seen corresponding path program 440 times [2021-06-05 22:07:41,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:41,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215407048] [2021-06-05 22:07:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:41,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:41,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215407048] [2021-06-05 22:07:41,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215407048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:41,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39592565] [2021-06-05 22:07:41,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:41,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:41,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:41,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:41,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39592565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:41,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:41,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:41,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673935260] [2021-06-05 22:07:41,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:41,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:41,997 INFO L87 Difference]: Start difference. First operand 822 states and 2834 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:42,751 INFO L93 Difference]: Finished difference Result 1533 states and 4790 transitions. [2021-06-05 22:07:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:07:42,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:42,753 INFO L225 Difference]: With dead ends: 1533 [2021-06-05 22:07:42,753 INFO L226 Difference]: Without dead ends: 1533 [2021-06-05 22:07:42,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 674.4ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:07:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-05 22:07:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 821. [2021-06-05 22:07:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.448780487804878) internal successors, (2828), 820 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2828 transitions. [2021-06-05 22:07:42,763 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2828 transitions. Word has length 20 [2021-06-05 22:07:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:42,764 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2828 transitions. [2021-06-05 22:07:42,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2828 transitions. [2021-06-05 22:07:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:42,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:42,765 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:42,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5018,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:42,965 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1339946116, now seen corresponding path program 441 times [2021-06-05 22:07:42,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:42,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916287169] [2021-06-05 22:07:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:43,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:43,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916287169] [2021-06-05 22:07:43,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916287169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:43,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684350745] [2021-06-05 22:07:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:43,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:43,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:43,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:43,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:43,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684350745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:43,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:43,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:43,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24816798] [2021-06-05 22:07:43,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:43,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:43,220 INFO L87 Difference]: Start difference. First operand 821 states and 2828 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:43,534 INFO L93 Difference]: Finished difference Result 1278 states and 4121 transitions. [2021-06-05 22:07:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:43,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:43,536 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 22:07:43,536 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 22:07:43,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 268.7ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 22:07:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 831. [2021-06-05 22:07:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.4397590361445785) internal successors, (2855), 830 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:43,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2855 transitions. [2021-06-05 22:07:43,546 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2855 transitions. Word has length 20 [2021-06-05 22:07:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:43,546 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2855 transitions. [2021-06-05 22:07:43,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2855 transitions. [2021-06-05 22:07:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:43,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:43,547 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:43,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5026,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:43,748 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:43,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1039597254, now seen corresponding path program 442 times [2021-06-05 22:07:43,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:43,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212858349] [2021-06-05 22:07:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:43,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:43,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212858349] [2021-06-05 22:07:43,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212858349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:43,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068875530] [2021-06-05 22:07:43,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:43,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:43,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:43,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:43,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:44,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068875530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:44,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:44,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:44,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617176408] [2021-06-05 22:07:44,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:44,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:44,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:44,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:44,004 INFO L87 Difference]: Start difference. First operand 831 states and 2855 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:44,319 INFO L93 Difference]: Finished difference Result 1369 states and 4359 transitions. [2021-06-05 22:07:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:44,321 INFO L225 Difference]: With dead ends: 1369 [2021-06-05 22:07:44,321 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 22:07:44,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 22:07:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 821. [2021-06-05 22:07:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.448780487804878) internal successors, (2828), 820 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2828 transitions. [2021-06-05 22:07:44,332 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2828 transitions. Word has length 20 [2021-06-05 22:07:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:44,332 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2828 transitions. [2021-06-05 22:07:44,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2828 transitions. [2021-06-05 22:07:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:44,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:44,333 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:44,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-06-05 22:07:44,533 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:44,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -844351768, now seen corresponding path program 443 times [2021-06-05 22:07:44,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:44,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619236386] [2021-06-05 22:07:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:44,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:44,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619236386] [2021-06-05 22:07:44,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619236386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:44,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181956554] [2021-06-05 22:07:44,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:44,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:44,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:44,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:44,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:44,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181956554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:44,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:44,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:44,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838971953] [2021-06-05 22:07:44,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:44,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:44,854 INFO L87 Difference]: Start difference. First operand 821 states and 2828 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:45,162 INFO L93 Difference]: Finished difference Result 1227 states and 3962 transitions. [2021-06-05 22:07:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:45,162 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:45,164 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 22:07:45,164 INFO L226 Difference]: Without dead ends: 1227 [2021-06-05 22:07:45,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:45,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-05 22:07:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 820. [2021-06-05 22:07:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.446886446886447) internal successors, (2823), 819 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2823 transitions. [2021-06-05 22:07:45,173 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2823 transitions. Word has length 20 [2021-06-05 22:07:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:45,173 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2823 transitions. [2021-06-05 22:07:45,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2823 transitions. [2021-06-05 22:07:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:45,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:45,174 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:45,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5041,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:45,375 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:45,375 INFO L82 PathProgramCache]: Analyzing trace with hash 779986000, now seen corresponding path program 444 times [2021-06-05 22:07:45,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:45,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131758668] [2021-06-05 22:07:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:45,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131758668] [2021-06-05 22:07:45,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131758668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:45,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498974780] [2021-06-05 22:07:45,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:45,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:45,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:45,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498974780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:45,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:45,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:45,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600546257] [2021-06-05 22:07:45,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:45,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:45,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:45,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:45,669 INFO L87 Difference]: Start difference. First operand 820 states and 2823 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:45,955 INFO L93 Difference]: Finished difference Result 1191 states and 3882 transitions. [2021-06-05 22:07:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:07:45,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:45,957 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 22:07:45,957 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 22:07:45,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 22:07:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 804. [2021-06-05 22:07:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.439601494396015) internal successors, (2762), 803 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2762 transitions. [2021-06-05 22:07:45,966 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2762 transitions. Word has length 20 [2021-06-05 22:07:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:45,966 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2762 transitions. [2021-06-05 22:07:45,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2762 transitions. [2021-06-05 22:07:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:45,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:45,967 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:46,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5052,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:46,168 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:46,168 INFO L82 PathProgramCache]: Analyzing trace with hash -766554712, now seen corresponding path program 445 times [2021-06-05 22:07:46,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:46,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118392143] [2021-06-05 22:07:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:46,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118392143] [2021-06-05 22:07:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118392143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145580974] [2021-06-05 22:07:46,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145580974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:46,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:46,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049455262] [2021-06-05 22:07:46,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:46,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:46,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:46,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:46,399 INFO L87 Difference]: Start difference. First operand 804 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:46,703 INFO L93 Difference]: Finished difference Result 1123 states and 3609 transitions. [2021-06-05 22:07:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:46,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:46,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:46,704 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 22:07:46,704 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 22:07:46,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 22:07:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 807. [2021-06-05 22:07:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.436724565756824) internal successors, (2770), 806 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2770 transitions. [2021-06-05 22:07:46,713 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2770 transitions. Word has length 20 [2021-06-05 22:07:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:46,713 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2770 transitions. [2021-06-05 22:07:46,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2770 transitions. [2021-06-05 22:07:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:46,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:46,714 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:46,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5059,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:46,915 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:46,915 INFO L82 PathProgramCache]: Analyzing trace with hash -58196494, now seen corresponding path program 446 times [2021-06-05 22:07:46,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:46,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330466689] [2021-06-05 22:07:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:46,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:46,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330466689] [2021-06-05 22:07:46,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330466689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607425042] [2021-06-05 22:07:46,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:47,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:47,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:47,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607425042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:47,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:47,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:47,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133921673] [2021-06-05 22:07:47,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:47,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:47,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:47,160 INFO L87 Difference]: Start difference. First operand 807 states and 2770 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:47,720 INFO L93 Difference]: Finished difference Result 1242 states and 3910 transitions. [2021-06-05 22:07:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:07:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:47,722 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 22:07:47,722 INFO L226 Difference]: Without dead ends: 1242 [2021-06-05 22:07:47,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:07:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-05 22:07:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 810. [2021-06-05 22:07:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4375772558714464) internal successors, (2781), 809 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2781 transitions. [2021-06-05 22:07:47,732 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2781 transitions. Word has length 20 [2021-06-05 22:07:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:47,732 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2781 transitions. [2021-06-05 22:07:47,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2781 transitions. [2021-06-05 22:07:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:47,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:47,733 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:47,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5061,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:47,933 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1552104216, now seen corresponding path program 447 times [2021-06-05 22:07:47,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:47,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639576938] [2021-06-05 22:07:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:47,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:47,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639576938] [2021-06-05 22:07:47,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639576938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:47,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448933288] [2021-06-05 22:07:47,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:48,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:48,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:48,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:48,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448933288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:48,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:48,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:48,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206221163] [2021-06-05 22:07:48,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:48,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:48,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:48,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:48,178 INFO L87 Difference]: Start difference. First operand 810 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:48,503 INFO L93 Difference]: Finished difference Result 1126 states and 3612 transitions. [2021-06-05 22:07:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:48,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:48,505 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 22:07:48,505 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 22:07:48,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 22:07:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 804. [2021-06-05 22:07:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.439601494396015) internal successors, (2762), 803 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2762 transitions. [2021-06-05 22:07:48,514 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2762 transitions. Word has length 20 [2021-06-05 22:07:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:48,514 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2762 transitions. [2021-06-05 22:07:48,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2762 transitions. [2021-06-05 22:07:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:48,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:48,515 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:48,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5066 [2021-06-05 22:07:48,715 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:48,716 INFO L82 PathProgramCache]: Analyzing trace with hash 635574444, now seen corresponding path program 448 times [2021-06-05 22:07:48,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:48,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611993538] [2021-06-05 22:07:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:48,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:48,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611993538] [2021-06-05 22:07:48,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611993538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:48,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349892736] [2021-06-05 22:07:48,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:48,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:48,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:48,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349892736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:48,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:48,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:48,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722914220] [2021-06-05 22:07:48,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:48,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:48,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:48,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:48,951 INFO L87 Difference]: Start difference. First operand 804 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:49,238 INFO L93 Difference]: Finished difference Result 1162 states and 3704 transitions. [2021-06-05 22:07:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:49,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:49,240 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 22:07:49,240 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 22:07:49,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 22:07:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 823. [2021-06-05 22:07:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.435523114355231) internal successors, (2824), 822 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-06-05 22:07:49,250 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-06-05 22:07:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:49,250 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-06-05 22:07:49,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-06-05 22:07:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:49,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:49,251 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:49,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5072,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:49,452 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2129986682, now seen corresponding path program 449 times [2021-06-05 22:07:49,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:49,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626471306] [2021-06-05 22:07:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:49,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:49,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626471306] [2021-06-05 22:07:49,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626471306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:49,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873061486] [2021-06-05 22:07:49,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:49,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:49,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:49,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873061486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:49,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:49,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:49,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325013800] [2021-06-05 22:07:49,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:49,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:49,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:49,757 INFO L87 Difference]: Start difference. First operand 823 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:50,142 INFO L93 Difference]: Finished difference Result 1164 states and 3708 transitions. [2021-06-05 22:07:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:50,144 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 22:07:50,144 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 22:07:50,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 22:07:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 823. [2021-06-05 22:07:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.435523114355231) internal successors, (2824), 822 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-06-05 22:07:50,154 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-06-05 22:07:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:50,154 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-06-05 22:07:50,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-06-05 22:07:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:50,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:50,155 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:50,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5078 [2021-06-05 22:07:50,371 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:50,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:50,372 INFO L82 PathProgramCache]: Analyzing trace with hash 636078960, now seen corresponding path program 450 times [2021-06-05 22:07:50,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:50,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931600570] [2021-06-05 22:07:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:50,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931600570] [2021-06-05 22:07:50,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931600570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986740776] [2021-06-05 22:07:50,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:50,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:50,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:50,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:50,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:50,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986740776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:50,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:50,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:50,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701800384] [2021-06-05 22:07:50,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:50,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:50,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:50,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:50,616 INFO L87 Difference]: Start difference. First operand 823 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:51,028 INFO L93 Difference]: Finished difference Result 1143 states and 3648 transitions. [2021-06-05 22:07:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:51,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:51,030 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 22:07:51,030 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 22:07:51,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 351.9ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 22:07:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 823. [2021-06-05 22:07:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.431873479318735) internal successors, (2821), 822 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2821 transitions. [2021-06-05 22:07:51,039 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2821 transitions. Word has length 20 [2021-06-05 22:07:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:51,040 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2821 transitions. [2021-06-05 22:07:51,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2821 transitions. [2021-06-05 22:07:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:51,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:51,041 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:51,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5085,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:51,241 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash -804863874, now seen corresponding path program 451 times [2021-06-05 22:07:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:51,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118373743] [2021-06-05 22:07:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:51,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:51,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118373743] [2021-06-05 22:07:51,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118373743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:51,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394033950] [2021-06-05 22:07:51,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:51,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:51,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394033950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:51,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:51,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:51,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623353624] [2021-06-05 22:07:51,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:51,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:51,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:51,476 INFO L87 Difference]: Start difference. First operand 823 states and 2821 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:51,783 INFO L93 Difference]: Finished difference Result 1111 states and 3584 transitions. [2021-06-05 22:07:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:51,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:51,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:51,785 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 22:07:51,785 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:07:51,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:07:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 820. [2021-06-05 22:07:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.4346764346764345) internal successors, (2813), 819 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2813 transitions. [2021-06-05 22:07:51,794 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2813 transitions. Word has length 20 [2021-06-05 22:07:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:51,796 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2813 transitions. [2021-06-05 22:07:51,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2813 transitions. [2021-06-05 22:07:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:51,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:51,797 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:52,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5091 [2021-06-05 22:07:52,009 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1173934538, now seen corresponding path program 452 times [2021-06-05 22:07:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:52,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723885584] [2021-06-05 22:07:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:52,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723885584] [2021-06-05 22:07:52,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723885584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381512718] [2021-06-05 22:07:52,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:52,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:52,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:52,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:52,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381512718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:52,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:52,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:07:52,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599477992] [2021-06-05 22:07:52,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:07:52,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:07:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:07:52,262 INFO L87 Difference]: Start difference. First operand 820 states and 2813 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:52,611 INFO L93 Difference]: Finished difference Result 1034 states and 3392 transitions. [2021-06-05 22:07:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:52,613 INFO L225 Difference]: With dead ends: 1034 [2021-06-05 22:07:52,613 INFO L226 Difference]: Without dead ends: 1022 [2021-06-05 22:07:52,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-06-05 22:07:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 820. [2021-06-05 22:07:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.431013431013431) internal successors, (2810), 819 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2810 transitions. [2021-06-05 22:07:52,622 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2810 transitions. Word has length 20 [2021-06-05 22:07:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:52,622 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2810 transitions. [2021-06-05 22:07:52,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2810 transitions. [2021-06-05 22:07:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:52,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:52,623 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:52,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5095,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:52,823 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1343932662, now seen corresponding path program 453 times [2021-06-05 22:07:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:52,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429753376] [2021-06-05 22:07:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:52,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429753376] [2021-06-05 22:07:52,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429753376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595036232] [2021-06-05 22:07:52,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:52,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:52,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:52,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:52,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:53,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595036232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:53,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:53,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:07:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717777918] [2021-06-05 22:07:53,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:07:53,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:07:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:07:53,047 INFO L87 Difference]: Start difference. First operand 820 states and 2810 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:53,334 INFO L93 Difference]: Finished difference Result 1048 states and 3431 transitions. [2021-06-05 22:07:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:07:53,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:53,336 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 22:07:53,336 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 22:07:53,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:07:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 22:07:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 801. [2021-06-05 22:07:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4425) internal successors, (2754), 800 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2754 transitions. [2021-06-05 22:07:53,345 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2754 transitions. Word has length 20 [2021-06-05 22:07:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:53,345 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2754 transitions. [2021-06-05 22:07:53,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2754 transitions. [2021-06-05 22:07:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:53,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:53,346 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:53,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5102 [2021-06-05 22:07:53,546 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:53,547 INFO L82 PathProgramCache]: Analyzing trace with hash -225239522, now seen corresponding path program 454 times [2021-06-05 22:07:53,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:53,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780701905] [2021-06-05 22:07:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:53,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:53,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780701905] [2021-06-05 22:07:53,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780701905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:53,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671454779] [2021-06-05 22:07:53,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:53,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:53,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:53,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671454779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:53,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:53,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:53,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852658803] [2021-06-05 22:07:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:53,836 INFO L87 Difference]: Start difference. First operand 801 states and 2754 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:54,236 INFO L93 Difference]: Finished difference Result 1254 states and 3940 transitions. [2021-06-05 22:07:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:54,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:54,238 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 22:07:54,238 INFO L226 Difference]: Without dead ends: 1254 [2021-06-05 22:07:54,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-06-05 22:07:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 808. [2021-06-05 22:07:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.44361833952912) internal successors, (2779), 807 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2779 transitions. [2021-06-05 22:07:54,247 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2779 transitions. Word has length 20 [2021-06-05 22:07:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:54,247 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2779 transitions. [2021-06-05 22:07:54,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2779 transitions. [2021-06-05 22:07:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:54,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:54,248 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:54,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5104,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:54,449 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash 483118696, now seen corresponding path program 455 times [2021-06-05 22:07:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:54,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435015662] [2021-06-05 22:07:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:54,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:54,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435015662] [2021-06-05 22:07:54,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435015662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:54,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467507300] [2021-06-05 22:07:54,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:54,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:54,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:54,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:54,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:54,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467507300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:54,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:54,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:54,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017150891] [2021-06-05 22:07:54,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:54,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:54,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:54,727 INFO L87 Difference]: Start difference. First operand 808 states and 2779 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:55,375 INFO L93 Difference]: Finished difference Result 1428 states and 4361 transitions. [2021-06-05 22:07:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:07:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:55,377 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 22:07:55,377 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 22:07:55,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 578.2ms TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:07:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 22:07:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 814. [2021-06-05 22:07:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4489544895448954) internal successors, (2804), 813 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2804 transitions. [2021-06-05 22:07:55,387 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2804 transitions. Word has length 20 [2021-06-05 22:07:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:55,387 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2804 transitions. [2021-06-05 22:07:55,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2804 transitions. [2021-06-05 22:07:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:55,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:55,388 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:55,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5109,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:55,589 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:55,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1010789026, now seen corresponding path program 456 times [2021-06-05 22:07:55,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:55,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761594112] [2021-06-05 22:07:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:55,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:55,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761594112] [2021-06-05 22:07:55,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761594112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:55,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098065875] [2021-06-05 22:07:55,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:55,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:55,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:55,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:55,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098065875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:55,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:55,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:55,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489692657] [2021-06-05 22:07:55,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:55,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:55,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:55,865 INFO L87 Difference]: Start difference. First operand 814 states and 2804 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:56,234 INFO L93 Difference]: Finished difference Result 1190 states and 3778 transitions. [2021-06-05 22:07:56,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:56,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:56,236 INFO L225 Difference]: With dead ends: 1190 [2021-06-05 22:07:56,236 INFO L226 Difference]: Without dead ends: 1184 [2021-06-05 22:07:56,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-05 22:07:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 814. [2021-06-05 22:07:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4415744157441575) internal successors, (2798), 813 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2798 transitions. [2021-06-05 22:07:56,245 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2798 transitions. Word has length 20 [2021-06-05 22:07:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:56,246 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2798 transitions. [2021-06-05 22:07:56,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2798 transitions. [2021-06-05 22:07:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:56,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:56,247 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:56,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5117,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:56,447 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:56,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1686879340, now seen corresponding path program 457 times [2021-06-05 22:07:56,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:56,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209225981] [2021-06-05 22:07:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:56,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:56,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209225981] [2021-06-05 22:07:56,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209225981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:56,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310200684] [2021-06-05 22:07:56,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:56,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:56,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:56,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310200684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:56,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:56,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:56,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646217686] [2021-06-05 22:07:56,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:56,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:56,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:56,727 INFO L87 Difference]: Start difference. First operand 814 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:57,098 INFO L93 Difference]: Finished difference Result 1100 states and 3553 transitions. [2021-06-05 22:07:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:57,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:57,100 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 22:07:57,100 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 22:07:57,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 22:07:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 814. [2021-06-05 22:07:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4415744157441575) internal successors, (2798), 813 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2798 transitions. [2021-06-05 22:07:57,109 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2798 transitions. Word has length 20 [2021-06-05 22:07:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:57,109 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2798 transitions. [2021-06-05 22:07:57,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2798 transitions. [2021-06-05 22:07:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:57,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:57,110 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:57,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5127,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:57,311 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1593337576, now seen corresponding path program 458 times [2021-06-05 22:07:57,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:57,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462761193] [2021-06-05 22:07:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:57,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:57,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462761193] [2021-06-05 22:07:57,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462761193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:57,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336738712] [2021-06-05 22:07:57,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:57,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:57,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:57,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:57,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336738712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:57,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:57,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:57,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167983246] [2021-06-05 22:07:57,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:57,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:57,591 INFO L87 Difference]: Start difference. First operand 814 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:57,930 INFO L93 Difference]: Finished difference Result 1196 states and 3803 transitions. [2021-06-05 22:07:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:57,932 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 22:07:57,932 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 22:07:57,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 22:07:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 804. [2021-06-05 22:07:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.448318804483188) internal successors, (2769), 803 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2769 transitions. [2021-06-05 22:07:57,942 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2769 transitions. Word has length 20 [2021-06-05 22:07:57,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:57,942 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2769 transitions. [2021-06-05 22:07:57,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2769 transitions. [2021-06-05 22:07:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:57,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:57,943 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:58,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-06-05 22:07:58,143 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1518863640, now seen corresponding path program 459 times [2021-06-05 22:07:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:58,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65117281] [2021-06-05 22:07:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:58,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:58,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65117281] [2021-06-05 22:07:58,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65117281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:58,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913430788] [2021-06-05 22:07:58,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:58,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:58,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:58,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913430788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:58,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:58,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:58,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253720655] [2021-06-05 22:07:58,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:58,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:58,422 INFO L87 Difference]: Start difference. First operand 804 states and 2769 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:58,771 INFO L93 Difference]: Finished difference Result 1208 states and 3832 transitions. [2021-06-05 22:07:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:58,773 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 22:07:58,773 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 22:07:58,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 22:07:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 805. [2021-06-05 22:07:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.451492537313433) internal successors, (2775), 804 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2775 transitions. [2021-06-05 22:07:58,783 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2775 transitions. Word has length 20 [2021-06-05 22:07:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:58,783 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2775 transitions. [2021-06-05 22:07:58,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2775 transitions. [2021-06-05 22:07:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:58,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:58,784 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:58,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5140 [2021-06-05 22:07:58,984 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 818966700, now seen corresponding path program 460 times [2021-06-05 22:07:58,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:58,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831616931] [2021-06-05 22:07:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:59,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:59,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831616931] [2021-06-05 22:07:59,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831616931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:59,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98620200] [2021-06-05 22:07:59,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:59,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:59,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:59,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98620200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:59,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:59,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:07:59,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203318285] [2021-06-05 22:07:59,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:07:59,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:07:59,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:07:59,264 INFO L87 Difference]: Start difference. First operand 805 states and 2775 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:59,551 INFO L93 Difference]: Finished difference Result 1175 states and 3755 transitions. [2021-06-05 22:07:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:59,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:07:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:59,552 INFO L225 Difference]: With dead ends: 1175 [2021-06-05 22:07:59,552 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 22:07:59,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 22:07:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 801. [2021-06-05 22:07:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4425) internal successors, (2754), 800 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2754 transitions. [2021-06-05 22:07:59,567 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2754 transitions. Word has length 20 [2021-06-05 22:07:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:59,567 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2754 transitions. [2021-06-05 22:07:59,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2754 transitions. [2021-06-05 22:07:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:07:59,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:59,568 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:59,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:59,769 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1914137786, now seen corresponding path program 461 times [2021-06-05 22:07:59,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:59,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531428239] [2021-06-05 22:07:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:59,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:59,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531428239] [2021-06-05 22:07:59,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531428239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:59,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666267796] [2021-06-05 22:07:59,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:59,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:59,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:59,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:07:59,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:00,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666267796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:00,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:00,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:00,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863999694] [2021-06-05 22:08:00,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:00,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:00,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:00,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:00,049 INFO L87 Difference]: Start difference. First operand 801 states and 2754 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:00,855 INFO L93 Difference]: Finished difference Result 1432 states and 4400 transitions. [2021-06-05 22:08:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:08:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:00,857 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 22:08:00,857 INFO L226 Difference]: Without dead ends: 1432 [2021-06-05 22:08:00,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 699.7ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:08:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-05 22:08:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 806. [2021-06-05 22:08:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.453416149068323) internal successors, (2780), 805 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2780 transitions. [2021-06-05 22:08:00,868 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2780 transitions. Word has length 20 [2021-06-05 22:08:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:00,868 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2780 transitions. [2021-06-05 22:08:00,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2780 transitions. [2021-06-05 22:08:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:00,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:00,869 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:01,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5154 [2021-06-05 22:08:01,069 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:01,070 INFO L82 PathProgramCache]: Analyzing trace with hash -765411196, now seen corresponding path program 462 times [2021-06-05 22:08:01,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:01,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796466794] [2021-06-05 22:08:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:01,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:01,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796466794] [2021-06-05 22:08:01,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796466794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:01,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113543781] [2021-06-05 22:08:01,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:01,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113543781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:01,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:01,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:01,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407234953] [2021-06-05 22:08:01,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:01,375 INFO L87 Difference]: Start difference. First operand 806 states and 2780 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:01,784 INFO L93 Difference]: Finished difference Result 1152 states and 3680 transitions. [2021-06-05 22:08:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:01,786 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 22:08:01,786 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 22:08:01,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 22:08:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 818. [2021-06-05 22:08:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-05 22:08:01,795 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-05 22:08:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:01,795 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-05 22:08:01,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-05 22:08:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:01,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:01,796 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:01,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5161,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:01,997 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:01,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1602491628, now seen corresponding path program 463 times [2021-06-05 22:08:01,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:01,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698082607] [2021-06-05 22:08:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:02,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:02,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698082607] [2021-06-05 22:08:02,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698082607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:02,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684728785] [2021-06-05 22:08:02,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:02,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:02,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684728785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:02,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:02,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:02,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951859507] [2021-06-05 22:08:02,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:02,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:02,311 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:02,653 INFO L93 Difference]: Finished difference Result 1098 states and 3559 transitions. [2021-06-05 22:08:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:02,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:02,655 INFO L225 Difference]: With dead ends: 1098 [2021-06-05 22:08:02,655 INFO L226 Difference]: Without dead ends: 1098 [2021-06-05 22:08:02,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-06-05 22:08:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 816. [2021-06-05 22:08:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.4478527607361964) internal successors, (2810), 815 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2810 transitions. [2021-06-05 22:08:02,664 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2810 transitions. Word has length 20 [2021-06-05 22:08:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:02,664 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2810 transitions. [2021-06-05 22:08:02,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2810 transitions. [2021-06-05 22:08:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:02,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:02,665 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:02,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5169,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:02,866 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:02,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1629429072, now seen corresponding path program 464 times [2021-06-05 22:08:02,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:02,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407082964] [2021-06-05 22:08:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:02,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:02,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407082964] [2021-06-05 22:08:02,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407082964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:02,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012700040] [2021-06-05 22:08:02,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:03,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:03,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:03,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:03,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012700040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:03,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:03,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:03,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013046173] [2021-06-05 22:08:03,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:03,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:03,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:03,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:03,131 INFO L87 Difference]: Start difference. First operand 816 states and 2810 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:03,804 INFO L93 Difference]: Finished difference Result 1312 states and 4126 transitions. [2021-06-05 22:08:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:08:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:03,806 INFO L225 Difference]: With dead ends: 1312 [2021-06-05 22:08:03,806 INFO L226 Difference]: Without dead ends: 1312 [2021-06-05 22:08:03,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:08:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-06-05 22:08:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 813. [2021-06-05 22:08:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.4433497536945814) internal successors, (2796), 812 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2796 transitions. [2021-06-05 22:08:03,816 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2796 transitions. Word has length 20 [2021-06-05 22:08:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:03,816 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2796 transitions. [2021-06-05 22:08:03,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2796 transitions. [2021-06-05 22:08:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:03,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:03,817 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:04,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5179 [2021-06-05 22:08:04,018 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:04,018 INFO L82 PathProgramCache]: Analyzing trace with hash -337086672, now seen corresponding path program 465 times [2021-06-05 22:08:04,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:04,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592318269] [2021-06-05 22:08:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:04,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:04,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592318269] [2021-06-05 22:08:04,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592318269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:04,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897145421] [2021-06-05 22:08:04,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:04,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:04,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:04,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:04,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897145421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:04,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:04,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:04,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925128780] [2021-06-05 22:08:04,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:04,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:04,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:04,304 INFO L87 Difference]: Start difference. First operand 813 states and 2796 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:04,869 INFO L93 Difference]: Finished difference Result 1281 states and 4059 transitions. [2021-06-05 22:08:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:08:04,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:04,871 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 22:08:04,871 INFO L226 Difference]: Without dead ends: 1281 [2021-06-05 22:08:04,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:08:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-05 22:08:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 812. [2021-06-05 22:08:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4401972872996303) internal successors, (2790), 811 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2790 transitions. [2021-06-05 22:08:04,881 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2790 transitions. Word has length 20 [2021-06-05 22:08:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:04,881 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2790 transitions. [2021-06-05 22:08:04,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2790 transitions. [2021-06-05 22:08:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:04,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:04,882 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:05,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5187 [2021-06-05 22:08:05,082 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:05,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1608692544, now seen corresponding path program 466 times [2021-06-05 22:08:05,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:05,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230926278] [2021-06-05 22:08:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:05,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230926278] [2021-06-05 22:08:05,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230926278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574351180] [2021-06-05 22:08:05,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:05,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:05,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:05,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:05,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574351180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:05,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:05,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:05,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827125272] [2021-06-05 22:08:05,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:05,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:05,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:05,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:05,340 INFO L87 Difference]: Start difference. First operand 812 states and 2790 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:05,632 INFO L93 Difference]: Finished difference Result 1105 states and 3580 transitions. [2021-06-05 22:08:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:05,633 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 22:08:05,633 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 22:08:05,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 22:08:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 822. [2021-06-05 22:08:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.433617539585871) internal successors, (2819), 821 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2819 transitions. [2021-06-05 22:08:05,648 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2819 transitions. Word has length 20 [2021-06-05 22:08:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:05,648 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2819 transitions. [2021-06-05 22:08:05,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2819 transitions. [2021-06-05 22:08:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:05,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:05,649 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:05,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5193 [2021-06-05 22:08:05,849 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:05,850 INFO L82 PathProgramCache]: Analyzing trace with hash 770850826, now seen corresponding path program 467 times [2021-06-05 22:08:05,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:05,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737663029] [2021-06-05 22:08:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:05,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:05,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737663029] [2021-06-05 22:08:05,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737663029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:05,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771846126] [2021-06-05 22:08:05,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:06,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:06,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:06,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771846126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:06,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:06,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668882169] [2021-06-05 22:08:06,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:06,126 INFO L87 Difference]: Start difference. First operand 822 states and 2819 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:06,483 INFO L93 Difference]: Finished difference Result 1200 states and 3828 transitions. [2021-06-05 22:08:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:06,485 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 22:08:06,485 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 22:08:06,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:06,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 22:08:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 812. [2021-06-05 22:08:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4401972872996303) internal successors, (2790), 811 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2790 transitions. [2021-06-05 22:08:06,494 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2790 transitions. Word has length 20 [2021-06-05 22:08:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:06,494 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2790 transitions. [2021-06-05 22:08:06,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2790 transitions. [2021-06-05 22:08:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:06,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:06,495 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:06,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5201 [2021-06-05 22:08:06,696 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:06,696 INFO L82 PathProgramCache]: Analyzing trace with hash 511239572, now seen corresponding path program 468 times [2021-06-05 22:08:06,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:06,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924889853] [2021-06-05 22:08:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:06,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924889853] [2021-06-05 22:08:06,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924889853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451844013] [2021-06-05 22:08:06,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:06,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:06,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:06,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:06,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:07,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451844013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:07,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:07,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:07,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743003452] [2021-06-05 22:08:07,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:07,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:07,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:07,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:07,033 INFO L87 Difference]: Start difference. First operand 812 states and 2790 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:07,296 INFO L93 Difference]: Finished difference Result 1058 states and 3468 transitions. [2021-06-05 22:08:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:08:07,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:07,298 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 22:08:07,298 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 22:08:07,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 22:08:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 800. [2021-06-05 22:08:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.439299123904881) internal successors, (2748), 799 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2748 transitions. [2021-06-05 22:08:07,307 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2748 transitions. Word has length 20 [2021-06-05 22:08:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:07,307 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2748 transitions. [2021-06-05 22:08:07,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2748 transitions. [2021-06-05 22:08:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:07,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:07,308 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:07,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5209 [2021-06-05 22:08:07,525 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2047493274, now seen corresponding path program 469 times [2021-06-05 22:08:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:07,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618479527] [2021-06-05 22:08:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:07,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618479527] [2021-06-05 22:08:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618479527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544765805] [2021-06-05 22:08:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:07,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:07,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544765805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:07,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:07,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:07,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283856782] [2021-06-05 22:08:07,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:07,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:07,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:07,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:07,829 INFO L87 Difference]: Start difference. First operand 800 states and 2748 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:08,135 INFO L93 Difference]: Finished difference Result 1176 states and 3748 transitions. [2021-06-05 22:08:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:08,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:08,137 INFO L225 Difference]: With dead ends: 1176 [2021-06-05 22:08:08,137 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 22:08:08,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 22:08:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 821. [2021-06-05 22:08:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4414634146341463) internal successors, (2822), 820 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2822 transitions. [2021-06-05 22:08:08,152 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2822 transitions. Word has length 20 [2021-06-05 22:08:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:08,152 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2822 transitions. [2021-06-05 22:08:08,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2822 transitions. [2021-06-05 22:08:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:08,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:08,153 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:08,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-06-05 22:08:08,354 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:08,354 INFO L82 PathProgramCache]: Analyzing trace with hash -753061784, now seen corresponding path program 470 times [2021-06-05 22:08:08,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:08,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134585813] [2021-06-05 22:08:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:08,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134585813] [2021-06-05 22:08:08,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134585813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535999359] [2021-06-05 22:08:08,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:08,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:08,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:08,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:08,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:08,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535999359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:08,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:08,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:08,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284418987] [2021-06-05 22:08:08,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:08,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:08,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:08,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:08,652 INFO L87 Difference]: Start difference. First operand 821 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:09,177 INFO L93 Difference]: Finished difference Result 1218 states and 3844 transitions. [2021-06-05 22:08:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:09,179 INFO L225 Difference]: With dead ends: 1218 [2021-06-05 22:08:09,179 INFO L226 Difference]: Without dead ends: 1218 [2021-06-05 22:08:09,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-06-05 22:08:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 821. [2021-06-05 22:08:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4414634146341463) internal successors, (2822), 820 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2822 transitions. [2021-06-05 22:08:09,189 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2822 transitions. Word has length 20 [2021-06-05 22:08:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:09,189 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2822 transitions. [2021-06-05 22:08:09,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2822 transitions. [2021-06-05 22:08:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:09,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:09,190 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:09,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5230 [2021-06-05 22:08:09,390 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:09,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:09,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2047997790, now seen corresponding path program 471 times [2021-06-05 22:08:09,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:09,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814303790] [2021-06-05 22:08:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:09,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:09,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814303790] [2021-06-05 22:08:09,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814303790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:09,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309837671] [2021-06-05 22:08:09,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:09,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:09,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:09,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:09,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309837671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:09,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:09,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:09,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640133300] [2021-06-05 22:08:09,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:09,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:09,682 INFO L87 Difference]: Start difference. First operand 821 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:10,226 INFO L93 Difference]: Finished difference Result 1143 states and 3655 transitions. [2021-06-05 22:08:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:08:10,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:10,228 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 22:08:10,228 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 22:08:10,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 520.0ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:08:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 22:08:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 821. [2021-06-05 22:08:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4378048780487807) internal successors, (2819), 820 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2819 transitions. [2021-06-05 22:08:10,238 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2819 transitions. Word has length 20 [2021-06-05 22:08:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:10,238 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2819 transitions. [2021-06-05 22:08:10,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2819 transitions. [2021-06-05 22:08:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:10,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:10,239 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:10,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5237 [2021-06-05 22:08:10,439 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash 607054956, now seen corresponding path program 472 times [2021-06-05 22:08:10,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:10,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838860322] [2021-06-05 22:08:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:10,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:10,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838860322] [2021-06-05 22:08:10,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838860322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:10,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872751976] [2021-06-05 22:08:10,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:10,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:10,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:10,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:10,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:10,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872751976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:10,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:10,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667423820] [2021-06-05 22:08:10,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:10,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:10,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:10,722 INFO L87 Difference]: Start difference. First operand 821 states and 2819 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:11,073 INFO L93 Difference]: Finished difference Result 1125 states and 3628 transitions. [2021-06-05 22:08:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:11,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:11,074 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 22:08:11,074 INFO L226 Difference]: Without dead ends: 1125 [2021-06-05 22:08:11,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-05 22:08:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 818. [2021-06-05 22:08:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.440636474908201) internal successors, (2811), 817 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2811 transitions. [2021-06-05 22:08:11,084 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2811 transitions. Word has length 20 [2021-06-05 22:08:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:11,084 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2811 transitions. [2021-06-05 22:08:11,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2811 transitions. [2021-06-05 22:08:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:11,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:11,085 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:11,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5245 [2021-06-05 22:08:11,285 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1709113928, now seen corresponding path program 473 times [2021-06-05 22:08:11,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:11,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641693841] [2021-06-05 22:08:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:11,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641693841] [2021-06-05 22:08:11,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641693841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954309240] [2021-06-05 22:08:11,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:11,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:11,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:11,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954309240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:11,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:11,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:11,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623433377] [2021-06-05 22:08:11,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:11,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:11,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:11,579 INFO L87 Difference]: Start difference. First operand 818 states and 2811 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:12,152 INFO L93 Difference]: Finished difference Result 1046 states and 3427 transitions. [2021-06-05 22:08:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:12,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:12,154 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 22:08:12,154 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 22:08:12,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 22:08:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 818. [2021-06-05 22:08:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.436964504283966) internal successors, (2808), 817 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2808 transitions. [2021-06-05 22:08:12,163 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2808 transitions. Word has length 20 [2021-06-05 22:08:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:12,163 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2808 transitions. [2021-06-05 22:08:12,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2808 transitions. [2021-06-05 22:08:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:12,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:12,164 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:12,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5252 [2021-06-05 22:08:12,364 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1539115804, now seen corresponding path program 474 times [2021-06-05 22:08:12,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:12,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742074682] [2021-06-05 22:08:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:12,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:12,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742074682] [2021-06-05 22:08:12,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742074682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:12,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321772147] [2021-06-05 22:08:12,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:12,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:12,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321772147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:12,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:12,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:12,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499522959] [2021-06-05 22:08:12,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:12,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:12,614 INFO L87 Difference]: Start difference. First operand 818 states and 2808 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:12,954 INFO L93 Difference]: Finished difference Result 1087 states and 3541 transitions. [2021-06-05 22:08:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:08:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:12,956 INFO L225 Difference]: With dead ends: 1087 [2021-06-05 22:08:12,956 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 22:08:12,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 22:08:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 815. [2021-06-05 22:08:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.43980343980344) internal successors, (2800), 814 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2800 transitions. [2021-06-05 22:08:12,965 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2800 transitions. Word has length 20 [2021-06-05 22:08:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:12,965 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2800 transitions. [2021-06-05 22:08:12,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2800 transitions. [2021-06-05 22:08:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:12,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:12,967 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:13,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5262 [2021-06-05 22:08:13,167 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:13,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:13,167 INFO L82 PathProgramCache]: Analyzing trace with hash -428896924, now seen corresponding path program 475 times [2021-06-05 22:08:13,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:13,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827132032] [2021-06-05 22:08:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:13,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:13,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827132032] [2021-06-05 22:08:13,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827132032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:13,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665867259] [2021-06-05 22:08:13,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:13,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665867259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:13,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:13,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:13,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368484810] [2021-06-05 22:08:13,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:13,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:13,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:13,435 INFO L87 Difference]: Start difference. First operand 815 states and 2800 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:13,723 INFO L93 Difference]: Finished difference Result 1274 states and 3975 transitions. [2021-06-05 22:08:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:13,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:13,725 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 22:08:13,725 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 22:08:13,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:13,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 22:08:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 823. [2021-06-05 22:08:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.451338199513382) internal successors, (2837), 822 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2837 transitions. [2021-06-05 22:08:13,735 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2837 transitions. Word has length 20 [2021-06-05 22:08:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:13,735 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2837 transitions. [2021-06-05 22:08:13,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2837 transitions. [2021-06-05 22:08:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:13,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:13,736 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:13,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5267 [2021-06-05 22:08:13,937 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1065515314, now seen corresponding path program 476 times [2021-06-05 22:08:13,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:13,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183478794] [2021-06-05 22:08:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:14,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:14,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183478794] [2021-06-05 22:08:14,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183478794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:14,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067764203] [2021-06-05 22:08:14,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:14,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:14,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:14,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:14,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:14,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067764203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:14,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:14,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819556642] [2021-06-05 22:08:14,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:14,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:14,223 INFO L87 Difference]: Start difference. First operand 823 states and 2837 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:14,750 INFO L93 Difference]: Finished difference Result 1437 states and 4376 transitions. [2021-06-05 22:08:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:08:14,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:14,765 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 22:08:14,765 INFO L226 Difference]: Without dead ends: 1437 [2021-06-05 22:08:14,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 471.9ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:08:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-06-05 22:08:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 827. [2021-06-05 22:08:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.4588377723970942) internal successors, (2857), 826 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2857 transitions. [2021-06-05 22:08:14,777 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2857 transitions. Word has length 20 [2021-06-05 22:08:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:14,777 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2857 transitions. [2021-06-05 22:08:14,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2857 transitions. [2021-06-05 22:08:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:14,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:14,778 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:14,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5276 [2021-06-05 22:08:14,978 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash -428392408, now seen corresponding path program 477 times [2021-06-05 22:08:14,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:14,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504514127] [2021-06-05 22:08:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:15,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:15,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504514127] [2021-06-05 22:08:15,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504514127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:15,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251812455] [2021-06-05 22:08:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:15,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:15,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:15,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251812455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:15,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:15,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:15,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831950685] [2021-06-05 22:08:15,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:15,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:15,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:15,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:15,307 INFO L87 Difference]: Start difference. First operand 827 states and 2857 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:15,807 INFO L93 Difference]: Finished difference Result 1233 states and 3887 transitions. [2021-06-05 22:08:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:08:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:15,809 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 22:08:15,809 INFO L226 Difference]: Without dead ends: 1227 [2021-06-05 22:08:15,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-05 22:08:15,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 833. [2021-06-05 22:08:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4459134615384617) internal successors, (2867), 832 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2867 transitions. [2021-06-05 22:08:15,819 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2867 transitions. Word has length 20 [2021-06-05 22:08:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:15,819 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2867 transitions. [2021-06-05 22:08:15,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2867 transitions. [2021-06-05 22:08:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:15,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:15,820 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:16,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5284 [2021-06-05 22:08:16,020 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:16,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:16,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1869335242, now seen corresponding path program 478 times [2021-06-05 22:08:16,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:16,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612053477] [2021-06-05 22:08:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:16,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:16,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612053477] [2021-06-05 22:08:16,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612053477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:16,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436140388] [2021-06-05 22:08:16,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:16,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:16,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:16,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436140388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:16,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:16,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:16,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823042778] [2021-06-05 22:08:16,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:16,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:16,291 INFO L87 Difference]: Start difference. First operand 833 states and 2867 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:16,638 INFO L93 Difference]: Finished difference Result 1222 states and 3859 transitions. [2021-06-05 22:08:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:16,639 INFO L225 Difference]: With dead ends: 1222 [2021-06-05 22:08:16,639 INFO L226 Difference]: Without dead ends: 1222 [2021-06-05 22:08:16,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-05 22:08:16,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 827. [2021-06-05 22:08:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.444309927360775) internal successors, (2845), 826 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2845 transitions. [2021-06-05 22:08:16,663 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2845 transitions. Word has length 20 [2021-06-05 22:08:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:16,663 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2845 transitions. [2021-06-05 22:08:16,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2845 transitions. [2021-06-05 22:08:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:16,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:16,664 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:16,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-06-05 22:08:16,864 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:16,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1614033668, now seen corresponding path program 479 times [2021-06-05 22:08:16,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:16,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869386480] [2021-06-05 22:08:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:16,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:16,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869386480] [2021-06-05 22:08:16,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869386480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:16,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069162651] [2021-06-05 22:08:16,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:17,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:17,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069162651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:17,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:17,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:17,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618807250] [2021-06-05 22:08:17,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:17,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:17,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:17,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:17,137 INFO L87 Difference]: Start difference. First operand 827 states and 2845 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:17,471 INFO L93 Difference]: Finished difference Result 1194 states and 3789 transitions. [2021-06-05 22:08:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:17,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:17,473 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 22:08:17,473 INFO L226 Difference]: Without dead ends: 1187 [2021-06-05 22:08:17,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-05 22:08:17,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 831. [2021-06-05 22:08:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.444578313253012) internal successors, (2859), 830 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2859 transitions. [2021-06-05 22:08:17,483 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2859 transitions. Word has length 20 [2021-06-05 22:08:17,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:17,483 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2859 transitions. [2021-06-05 22:08:17,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2859 transitions. [2021-06-05 22:08:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:17,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:17,484 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:17,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5305,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:17,685 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:17,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:17,685 INFO L82 PathProgramCache]: Analyzing trace with hash 753869156, now seen corresponding path program 480 times [2021-06-05 22:08:17,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:17,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140542037] [2021-06-05 22:08:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:17,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:17,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140542037] [2021-06-05 22:08:17,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140542037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:17,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090311966] [2021-06-05 22:08:17,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:17,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:17,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090311966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:17,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:17,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:17,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205429702] [2021-06-05 22:08:17,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:17,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:17,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:17,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:17,949 INFO L87 Difference]: Start difference. First operand 831 states and 2859 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:18,249 INFO L93 Difference]: Finished difference Result 1116 states and 3627 transitions. [2021-06-05 22:08:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:08:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:18,250 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 22:08:18,250 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 22:08:18,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 22:08:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 829. [2021-06-05 22:08:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4468599033816427) internal successors, (2854), 828 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2854 transitions. [2021-06-05 22:08:18,260 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2854 transitions. Word has length 20 [2021-06-05 22:08:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:18,260 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2854 transitions. [2021-06-05 22:08:18,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2854 transitions. [2021-06-05 22:08:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:18,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:18,261 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:18,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:18,461 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:18,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:18,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1816915752, now seen corresponding path program 481 times [2021-06-05 22:08:18,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:18,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855686907] [2021-06-05 22:08:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:18,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:18,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855686907] [2021-06-05 22:08:18,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855686907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:18,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493820074] [2021-06-05 22:08:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:18,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:18,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493820074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:18,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:18,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:18,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423502230] [2021-06-05 22:08:18,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:18,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:18,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:18,769 INFO L87 Difference]: Start difference. First operand 829 states and 2854 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:19,230 INFO L93 Difference]: Finished difference Result 1262 states and 3969 transitions. [2021-06-05 22:08:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:19,231 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 22:08:19,232 INFO L226 Difference]: Without dead ends: 1262 [2021-06-05 22:08:19,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-06-05 22:08:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 820. [2021-06-05 22:08:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.451770451770452) internal successors, (2827), 819 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2827 transitions. [2021-06-05 22:08:19,241 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2827 transitions. Word has length 20 [2021-06-05 22:08:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:19,241 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2827 transitions. [2021-06-05 22:08:19,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2827 transitions. [2021-06-05 22:08:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:19,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:19,242 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:19,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-06-05 22:08:19,443 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1185709144, now seen corresponding path program 482 times [2021-06-05 22:08:19,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:19,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25257078] [2021-06-05 22:08:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:19,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:19,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25257078] [2021-06-05 22:08:19,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25257078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:19,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727134346] [2021-06-05 22:08:19,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:19,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:19,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:19,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727134346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:19,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:19,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:19,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330644717] [2021-06-05 22:08:19,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:19,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:19,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:19,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:19,744 INFO L87 Difference]: Start difference. First operand 820 states and 2827 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:20,173 INFO L93 Difference]: Finished difference Result 1225 states and 3887 transitions. [2021-06-05 22:08:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:20,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:20,175 INFO L225 Difference]: With dead ends: 1225 [2021-06-05 22:08:20,175 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 22:08:20,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 22:08:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 819. [2021-06-05 22:08:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4486552567237165) internal successors, (2821), 818 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2821 transitions. [2021-06-05 22:08:20,184 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2821 transitions. Word has length 20 [2021-06-05 22:08:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:20,184 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2821 transitions. [2021-06-05 22:08:20,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2821 transitions. [2021-06-05 22:08:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:20,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:20,185 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:20,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5336,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:20,386 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:20,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1837652280, now seen corresponding path program 483 times [2021-06-05 22:08:20,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:20,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240009092] [2021-06-05 22:08:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:20,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:20,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240009092] [2021-06-05 22:08:20,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240009092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:20,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305741415] [2021-06-05 22:08:20,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:20,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:20,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:20,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305741415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:20,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:20,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:20,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550208938] [2021-06-05 22:08:20,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:20,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:20,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:20,680 INFO L87 Difference]: Start difference. First operand 819 states and 2821 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:21,101 INFO L93 Difference]: Finished difference Result 1133 states and 3646 transitions. [2021-06-05 22:08:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:21,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:21,103 INFO L225 Difference]: With dead ends: 1133 [2021-06-05 22:08:21,103 INFO L226 Difference]: Without dead ends: 1127 [2021-06-05 22:08:21,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-05 22:08:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 829. [2021-06-05 22:08:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4396135265700485) internal successors, (2848), 828 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2848 transitions. [2021-06-05 22:08:21,113 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2848 transitions. Word has length 20 [2021-06-05 22:08:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:21,113 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2848 transitions. [2021-06-05 22:08:21,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2848 transitions. [2021-06-05 22:08:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:21,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:21,114 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:21,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5350 [2021-06-05 22:08:21,314 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:21,314 INFO L82 PathProgramCache]: Analyzing trace with hash -77771646, now seen corresponding path program 484 times [2021-06-05 22:08:21,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:21,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581513811] [2021-06-05 22:08:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:21,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581513811] [2021-06-05 22:08:21,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581513811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626057526] [2021-06-05 22:08:21,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:21,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:21,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:21,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:21,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626057526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:21,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:21,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:21,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796572402] [2021-06-05 22:08:21,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:21,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:21,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:21,612 INFO L87 Difference]: Start difference. First operand 829 states and 2848 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:22,048 INFO L93 Difference]: Finished difference Result 1232 states and 3904 transitions. [2021-06-05 22:08:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:22,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:22,049 INFO L225 Difference]: With dead ends: 1232 [2021-06-05 22:08:22,049 INFO L226 Difference]: Without dead ends: 1232 [2021-06-05 22:08:22,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-06-05 22:08:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 819. [2021-06-05 22:08:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4486552567237165) internal successors, (2821), 818 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2821 transitions. [2021-06-05 22:08:22,059 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2821 transitions. Word has length 20 [2021-06-05 22:08:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:22,059 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2821 transitions. [2021-06-05 22:08:22,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2821 transitions. [2021-06-05 22:08:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:22,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:22,060 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:22,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5360,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:22,260 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1961720668, now seen corresponding path program 485 times [2021-06-05 22:08:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:22,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009821657] [2021-06-05 22:08:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:22,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:22,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009821657] [2021-06-05 22:08:22,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009821657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:22,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485569590] [2021-06-05 22:08:22,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:22,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:22,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:22,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485569590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:22,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:22,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:22,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272919637] [2021-06-05 22:08:22,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:22,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:22,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:22,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:22,531 INFO L87 Difference]: Start difference. First operand 819 states and 2821 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:22,805 INFO L93 Difference]: Finished difference Result 1162 states and 3733 transitions. [2021-06-05 22:08:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:22,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:22,807 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 22:08:22,807 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 22:08:22,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 22:08:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 822. [2021-06-05 22:08:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.454323995127893) internal successors, (2836), 821 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2836 transitions. [2021-06-05 22:08:22,816 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2836 transitions. Word has length 20 [2021-06-05 22:08:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:22,816 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2836 transitions. [2021-06-05 22:08:22,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2836 transitions. [2021-06-05 22:08:22,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:22,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:22,817 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:23,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5370,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:23,018 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash -337382900, now seen corresponding path program 486 times [2021-06-05 22:08:23,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:23,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331946963] [2021-06-05 22:08:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:23,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:23,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331946963] [2021-06-05 22:08:23,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331946963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:23,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835811119] [2021-06-05 22:08:23,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:23,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:23,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:23,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:23,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835811119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:23,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:23,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:23,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312892715] [2021-06-05 22:08:23,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:23,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:23,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:23,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:23,285 INFO L87 Difference]: Start difference. First operand 822 states and 2836 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:23,585 INFO L93 Difference]: Finished difference Result 1126 states and 3653 transitions. [2021-06-05 22:08:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:23,587 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 22:08:23,587 INFO L226 Difference]: Without dead ends: 1126 [2021-06-05 22:08:23,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-06-05 22:08:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 818. [2021-06-05 22:08:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-05 22:08:23,596 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-05 22:08:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:23,596 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-05 22:08:23,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-05 22:08:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:23,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:23,597 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:23,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5378,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:23,797 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash -181205336, now seen corresponding path program 487 times [2021-06-05 22:08:23,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:23,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216599279] [2021-06-05 22:08:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:23,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:23,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216599279] [2021-06-05 22:08:23,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216599279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:23,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664930594] [2021-06-05 22:08:23,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:23,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:23,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:24,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664930594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:24,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:24,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:24,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846006566] [2021-06-05 22:08:24,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:24,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:24,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:24,108 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:24,754 INFO L93 Difference]: Finished difference Result 1040 states and 3418 transitions. [2021-06-05 22:08:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:24,755 INFO L225 Difference]: With dead ends: 1040 [2021-06-05 22:08:24,756 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 22:08:24,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:08:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 22:08:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 820. [2021-06-05 22:08:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-05 22:08:24,765 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-05 22:08:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:24,765 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-05 22:08:24,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-05 22:08:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:24,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:24,766 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:24,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5386,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:24,966 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:24,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:24,966 INFO L82 PathProgramCache]: Analyzing trace with hash 570195102, now seen corresponding path program 488 times [2021-06-05 22:08:24,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:24,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269233220] [2021-06-05 22:08:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:25,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269233220] [2021-06-05 22:08:25,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269233220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625329577] [2021-06-05 22:08:25,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:25,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:25,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:25,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:25,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:25,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625329577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:25,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:25,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:25,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530879935] [2021-06-05 22:08:25,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:25,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:25,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:25,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:25,262 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:25,820 INFO L93 Difference]: Finished difference Result 1065 states and 3470 transitions. [2021-06-05 22:08:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:25,821 INFO L225 Difference]: With dead ends: 1065 [2021-06-05 22:08:25,822 INFO L226 Difference]: Without dead ends: 1059 [2021-06-05 22:08:25,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:08:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-06-05 22:08:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 830. [2021-06-05 22:08:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.436670687575392) internal successors, (2849), 829 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2849 transitions. [2021-06-05 22:08:25,831 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2849 transitions. Word has length 20 [2021-06-05 22:08:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:25,831 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2849 transitions. [2021-06-05 22:08:25,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2849 transitions. [2021-06-05 22:08:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:25,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:25,832 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:26,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5393 [2021-06-05 22:08:26,032 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:26,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:26,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1345228824, now seen corresponding path program 489 times [2021-06-05 22:08:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:26,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086077393] [2021-06-05 22:08:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:26,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:26,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086077393] [2021-06-05 22:08:26,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086077393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:26,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15712410] [2021-06-05 22:08:26,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:26,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:26,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:26,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:26,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15712410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:26,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:26,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:26,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32968516] [2021-06-05 22:08:26,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:26,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:26,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:26,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:26,326 INFO L87 Difference]: Start difference. First operand 830 states and 2849 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:26,929 INFO L93 Difference]: Finished difference Result 1158 states and 3713 transitions. [2021-06-05 22:08:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:26,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:26,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:26,930 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 22:08:26,930 INFO L226 Difference]: Without dead ends: 1158 [2021-06-05 22:08:26,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-05 22:08:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 818. [2021-06-05 22:08:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-05 22:08:26,940 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-05 22:08:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:26,940 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-05 22:08:26,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-05 22:08:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:26,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:26,941 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:27,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5401,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:27,141 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash -108096714, now seen corresponding path program 490 times [2021-06-05 22:08:27,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:27,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431479968] [2021-06-05 22:08:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:27,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:27,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431479968] [2021-06-05 22:08:27,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431479968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:27,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209861570] [2021-06-05 22:08:27,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:27,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:27,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:27,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:27,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:27,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209861570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:27,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:27,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:27,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217643454] [2021-06-05 22:08:27,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:27,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:27,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:27,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:27,399 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:27,749 INFO L93 Difference]: Finished difference Result 1075 states and 3518 transitions. [2021-06-05 22:08:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:27,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:27,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:27,750 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 22:08:27,750 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 22:08:27,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 323.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 22:08:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 817. [2021-06-05 22:08:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.4473039215686274) internal successors, (2813), 816 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2813 transitions. [2021-06-05 22:08:27,760 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2813 transitions. Word has length 20 [2021-06-05 22:08:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:27,760 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2813 transitions. [2021-06-05 22:08:27,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2813 transitions. [2021-06-05 22:08:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:27,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:27,761 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:27,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5413 [2021-06-05 22:08:27,961 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:27,961 INFO L82 PathProgramCache]: Analyzing trace with hash 643303724, now seen corresponding path program 491 times [2021-06-05 22:08:27,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:27,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264532467] [2021-06-05 22:08:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:28,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:28,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264532467] [2021-06-05 22:08:28,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264532467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:28,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198129458] [2021-06-05 22:08:28,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:28,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:28,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:28,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:28,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198129458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:28,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:28,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045472378] [2021-06-05 22:08:28,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:28,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:28,231 INFO L87 Difference]: Start difference. First operand 817 states and 2813 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:28,578 INFO L93 Difference]: Finished difference Result 1095 states and 3557 transitions. [2021-06-05 22:08:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:28,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:28,579 INFO L225 Difference]: With dead ends: 1095 [2021-06-05 22:08:28,580 INFO L226 Difference]: Without dead ends: 1095 [2021-06-05 22:08:28,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-05 22:08:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 816. [2021-06-05 22:08:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.445398773006135) internal successors, (2808), 815 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2808 transitions. [2021-06-05 22:08:28,589 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2808 transitions. Word has length 20 [2021-06-05 22:08:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:28,589 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2808 transitions. [2021-06-05 22:08:28,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2808 transitions. [2021-06-05 22:08:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:28,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:28,590 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:28,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5418,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:28,790 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:28,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2027325804, now seen corresponding path program 492 times [2021-06-05 22:08:28,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:28,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923614307] [2021-06-05 22:08:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:28,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:28,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923614307] [2021-06-05 22:08:28,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923614307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:28,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607021194] [2021-06-05 22:08:28,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:28,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:28,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:28,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:29,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607021194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:29,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:29,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752507109] [2021-06-05 22:08:29,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:29,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:29,095 INFO L87 Difference]: Start difference. First operand 816 states and 2808 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:29,391 INFO L93 Difference]: Finished difference Result 1053 states and 3462 transitions. [2021-06-05 22:08:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:29,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:29,392 INFO L225 Difference]: With dead ends: 1053 [2021-06-05 22:08:29,392 INFO L226 Difference]: Without dead ends: 1053 [2021-06-05 22:08:29,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-05 22:08:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 797. [2021-06-05 22:08:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4321608040201004) internal successors, (2732), 796 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2732 transitions. [2021-06-05 22:08:29,401 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2732 transitions. Word has length 20 [2021-06-05 22:08:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:29,401 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2732 transitions. [2021-06-05 22:08:29,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2732 transitions. [2021-06-05 22:08:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:29,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:29,402 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:29,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:29,603 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash 432548454, now seen corresponding path program 493 times [2021-06-05 22:08:29,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:29,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165194193] [2021-06-05 22:08:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:29,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:29,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165194193] [2021-06-05 22:08:29,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165194193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:29,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312252400] [2021-06-05 22:08:29,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:29,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:29,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312252400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:29,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:29,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:08:29,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023107057] [2021-06-05 22:08:29,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:08:29,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:08:29,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:08:29,816 INFO L87 Difference]: Start difference. First operand 797 states and 2732 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:30,127 INFO L93 Difference]: Finished difference Result 1260 states and 3974 transitions. [2021-06-05 22:08:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:30,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:30,128 INFO L225 Difference]: With dead ends: 1260 [2021-06-05 22:08:30,128 INFO L226 Difference]: Without dead ends: 1260 [2021-06-05 22:08:30,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-06-05 22:08:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 797. [2021-06-05 22:08:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4321608040201004) internal successors, (2732), 796 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2732 transitions. [2021-06-05 22:08:30,138 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2732 transitions. Word has length 20 [2021-06-05 22:08:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:30,138 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2732 transitions. [2021-06-05 22:08:30,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2732 transitions. [2021-06-05 22:08:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:30,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:30,139 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:30,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5433,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:30,340 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1990759516, now seen corresponding path program 494 times [2021-06-05 22:08:30,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:30,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102877764] [2021-06-05 22:08:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:30,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:30,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102877764] [2021-06-05 22:08:30,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102877764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:30,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017564897] [2021-06-05 22:08:30,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:30,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:30,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:30,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:30,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:30,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017564897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:30,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:30,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:08:30,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731042768] [2021-06-05 22:08:30,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:08:30,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:08:30,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:08:30,579 INFO L87 Difference]: Start difference. First operand 797 states and 2732 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:31,131 INFO L93 Difference]: Finished difference Result 1403 states and 4327 transitions. [2021-06-05 22:08:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:08:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:31,133 INFO L225 Difference]: With dead ends: 1403 [2021-06-05 22:08:31,133 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 22:08:31,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:08:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 22:08:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 803. [2021-06-05 22:08:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.4301745635910224) internal successors, (2751), 802 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2751 transitions. [2021-06-05 22:08:31,143 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2751 transitions. Word has length 20 [2021-06-05 22:08:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:31,143 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2751 transitions. [2021-06-05 22:08:31,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2751 transitions. [2021-06-05 22:08:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:31,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:31,144 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:31,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5437,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:31,345 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1595849562, now seen corresponding path program 495 times [2021-06-05 22:08:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:31,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959610227] [2021-06-05 22:08:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:31,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:31,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959610227] [2021-06-05 22:08:31,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959610227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:31,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594485605] [2021-06-05 22:08:31,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:31,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:31,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:31,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:31,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594485605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:31,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:31,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:08:31,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539087581] [2021-06-05 22:08:31,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:08:31,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:08:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:08:31,586 INFO L87 Difference]: Start difference. First operand 803 states and 2751 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:32,654 INFO L93 Difference]: Finished difference Result 1586 states and 4789 transitions. [2021-06-05 22:08:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:08:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:32,656 INFO L225 Difference]: With dead ends: 1586 [2021-06-05 22:08:32,656 INFO L226 Difference]: Without dead ends: 1586 [2021-06-05 22:08:32,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 939.2ms TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:08:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-05 22:08:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 798. [2021-06-05 22:08:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4429109159347555) internal successors, (2744), 797 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2744 transitions. [2021-06-05 22:08:32,668 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2744 transitions. Word has length 20 [2021-06-05 22:08:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:32,668 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2744 transitions. [2021-06-05 22:08:32,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2744 transitions. [2021-06-05 22:08:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:32,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:32,669 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:32,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5441,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:32,869 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 655741044, now seen corresponding path program 496 times [2021-06-05 22:08:32,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:32,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032163003] [2021-06-05 22:08:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:32,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:32,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032163003] [2021-06-05 22:08:32,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032163003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:32,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441177495] [2021-06-05 22:08:32,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:33,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:33,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:33,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:33,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:33,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441177495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:33,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:33,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:33,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891731085] [2021-06-05 22:08:33,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:33,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:33,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:33,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:33,143 INFO L87 Difference]: Start difference. First operand 798 states and 2744 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:33,654 INFO L93 Difference]: Finished difference Result 1322 states and 4159 transitions. [2021-06-05 22:08:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:08:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:33,656 INFO L225 Difference]: With dead ends: 1322 [2021-06-05 22:08:33,656 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 22:08:33,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 22:08:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 798. [2021-06-05 22:08:33,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.437892095357591) internal successors, (2740), 797 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2740 transitions. [2021-06-05 22:08:33,673 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2740 transitions. Word has length 20 [2021-06-05 22:08:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:33,674 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2740 transitions. [2021-06-05 22:08:33,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2740 transitions. [2021-06-05 22:08:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:33,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:33,675 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:33,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5449,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:33,875 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:33,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:33,876 INFO L82 PathProgramCache]: Analyzing trace with hash 40903004, now seen corresponding path program 497 times [2021-06-05 22:08:33,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:33,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698352201] [2021-06-05 22:08:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:33,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:33,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698352201] [2021-06-05 22:08:33,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698352201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:33,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308775340] [2021-06-05 22:08:33,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:34,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:34,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:34,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:34,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308775340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:34,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:34,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:34,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445217660] [2021-06-05 22:08:34,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:34,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:34,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:34,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:34,186 INFO L87 Difference]: Start difference. First operand 798 states and 2740 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:34,826 INFO L93 Difference]: Finished difference Result 1271 states and 4059 transitions. [2021-06-05 22:08:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:34,827 INFO L225 Difference]: With dead ends: 1271 [2021-06-05 22:08:34,827 INFO L226 Difference]: Without dead ends: 1271 [2021-06-05 22:08:34,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 642.0ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-05 22:08:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 792. [2021-06-05 22:08:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4424778761061945) internal successors, (2723), 791 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2723 transitions. [2021-06-05 22:08:34,838 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2723 transitions. Word has length 20 [2021-06-05 22:08:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:34,838 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2723 transitions. [2021-06-05 22:08:34,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2723 transitions. [2021-06-05 22:08:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:34,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:34,839 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:35,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5456,526 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:35,039 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:35,039 INFO L82 PathProgramCache]: Analyzing trace with hash 973863644, now seen corresponding path program 498 times [2021-06-05 22:08:35,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:35,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499349448] [2021-06-05 22:08:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:35,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:35,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499349448] [2021-06-05 22:08:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499349448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:35,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753210959] [2021-06-05 22:08:35,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:35,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:35,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:35,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753210959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:35,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:35,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:08:35,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086653020] [2021-06-05 22:08:35,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:08:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:35,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:08:35,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:08:35,273 INFO L87 Difference]: Start difference. First operand 792 states and 2723 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:35,591 INFO L93 Difference]: Finished difference Result 1401 states and 4368 transitions. [2021-06-05 22:08:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:35,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:35,592 INFO L225 Difference]: With dead ends: 1401 [2021-06-05 22:08:35,592 INFO L226 Difference]: Without dead ends: 1401 [2021-06-05 22:08:35,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-05 22:08:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 798. [2021-06-05 22:08:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4466750313676284) internal successors, (2747), 797 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2747 transitions. [2021-06-05 22:08:35,603 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2747 transitions. Word has length 20 [2021-06-05 22:08:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:35,603 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2747 transitions. [2021-06-05 22:08:35,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2747 transitions. [2021-06-05 22:08:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:35,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:35,604 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:35,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5463 [2021-06-05 22:08:35,805 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 58849244, now seen corresponding path program 499 times [2021-06-05 22:08:35,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:35,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434503622] [2021-06-05 22:08:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:35,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:35,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434503622] [2021-06-05 22:08:35,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434503622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:35,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904412999] [2021-06-05 22:08:35,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:35,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:36,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904412999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:36,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:36,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:36,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676526910] [2021-06-05 22:08:36,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:36,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:36,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:36,053 INFO L87 Difference]: Start difference. First operand 798 states and 2747 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:36,397 INFO L93 Difference]: Finished difference Result 1325 states and 4183 transitions. [2021-06-05 22:08:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:36,399 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 22:08:36,399 INFO L226 Difference]: Without dead ends: 1325 [2021-06-05 22:08:36,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-06-05 22:08:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 801. [2021-06-05 22:08:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4525) internal successors, (2762), 800 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2762 transitions. [2021-06-05 22:08:36,409 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2762 transitions. Word has length 20 [2021-06-05 22:08:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:36,409 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2762 transitions. [2021-06-05 22:08:36,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2762 transitions. [2021-06-05 22:08:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:36,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:36,410 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:36,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5468,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:36,610 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:36,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:36,611 INFO L82 PathProgramCache]: Analyzing trace with hash -707996904, now seen corresponding path program 500 times [2021-06-05 22:08:36,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:36,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420911047] [2021-06-05 22:08:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:36,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420911047] [2021-06-05 22:08:36,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420911047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638462328] [2021-06-05 22:08:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:36,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:36,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:36,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:36,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:36,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638462328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:36,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:36,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:36,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909809330] [2021-06-05 22:08:36,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:36,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:36,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:36,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:36,868 INFO L87 Difference]: Start difference. First operand 801 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:37,277 INFO L93 Difference]: Finished difference Result 1357 states and 4264 transitions. [2021-06-05 22:08:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:37,277 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:37,279 INFO L225 Difference]: With dead ends: 1357 [2021-06-05 22:08:37,279 INFO L226 Difference]: Without dead ends: 1357 [2021-06-05 22:08:37,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-06-05 22:08:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 802. [2021-06-05 22:08:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4556803995006242) internal successors, (2768), 801 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2768 transitions. [2021-06-05 22:08:37,290 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2768 transitions. Word has length 20 [2021-06-05 22:08:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:37,290 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2768 transitions. [2021-06-05 22:08:37,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2768 transitions. [2021-06-05 22:08:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:37,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:37,291 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:37,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:37,491 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:37,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1629833436, now seen corresponding path program 501 times [2021-06-05 22:08:37,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:37,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253863522] [2021-06-05 22:08:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:37,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:37,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253863522] [2021-06-05 22:08:37,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253863522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:37,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575652633] [2021-06-05 22:08:37,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:37,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:37,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:37,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:37,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:37,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575652633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:37,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:37,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:37,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833633700] [2021-06-05 22:08:37,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:37,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:37,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:37,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:37,749 INFO L87 Difference]: Start difference. First operand 802 states and 2768 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:38,061 INFO L93 Difference]: Finished difference Result 1324 states and 4187 transitions. [2021-06-05 22:08:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:38,063 INFO L225 Difference]: With dead ends: 1324 [2021-06-05 22:08:38,063 INFO L226 Difference]: Without dead ends: 1324 [2021-06-05 22:08:38,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-05 22:08:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 792. [2021-06-05 22:08:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4424778761061945) internal successors, (2723), 791 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2723 transitions. [2021-06-05 22:08:38,073 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2723 transitions. Word has length 20 [2021-06-05 22:08:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:38,074 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2723 transitions. [2021-06-05 22:08:38,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2723 transitions. [2021-06-05 22:08:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:38,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:38,075 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:38,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5478,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:38,275 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:38,275 INFO L82 PathProgramCache]: Analyzing trace with hash 819892878, now seen corresponding path program 502 times [2021-06-05 22:08:38,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:38,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013843654] [2021-06-05 22:08:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:38,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:38,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013843654] [2021-06-05 22:08:38,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013843654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:38,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025804531] [2021-06-05 22:08:38,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:38,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:38,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:38,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:38,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025804531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:38,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:38,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:38,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097441667] [2021-06-05 22:08:38,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:38,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:38,529 INFO L87 Difference]: Start difference. First operand 792 states and 2723 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:39,085 INFO L93 Difference]: Finished difference Result 1452 states and 4481 transitions. [2021-06-05 22:08:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:08:39,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:39,087 INFO L225 Difference]: With dead ends: 1452 [2021-06-05 22:08:39,087 INFO L226 Difference]: Without dead ends: 1452 [2021-06-05 22:08:39,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:08:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-06-05 22:08:39,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 799. [2021-06-05 22:08:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.443609022556391) internal successors, (2748), 798 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2748 transitions. [2021-06-05 22:08:39,097 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2748 transitions. Word has length 20 [2021-06-05 22:08:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:39,097 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2748 transitions. [2021-06-05 22:08:39,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2748 transitions. [2021-06-05 22:08:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:39,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:39,098 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:39,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5484 [2021-06-05 22:08:39,299 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:39,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1528251096, now seen corresponding path program 503 times [2021-06-05 22:08:39,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:39,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039122717] [2021-06-05 22:08:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:39,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:39,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039122717] [2021-06-05 22:08:39,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039122717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:39,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260422012] [2021-06-05 22:08:39,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:39,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:39,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:39,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:39,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260422012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:39,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:39,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:39,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814780315] [2021-06-05 22:08:39,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:39,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:39,554 INFO L87 Difference]: Start difference. First operand 799 states and 2748 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:40,398 INFO L93 Difference]: Finished difference Result 1547 states and 4730 transitions. [2021-06-05 22:08:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:08:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:40,400 INFO L225 Difference]: With dead ends: 1547 [2021-06-05 22:08:40,400 INFO L226 Difference]: Without dead ends: 1547 [2021-06-05 22:08:40,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 730.8ms TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:08:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-06-05 22:08:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 793. [2021-06-05 22:08:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-05 22:08:40,411 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-05 22:08:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:40,411 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-05 22:08:40,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-05 22:08:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:40,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:40,412 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:40,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5489,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:40,613 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash -641746940, now seen corresponding path program 504 times [2021-06-05 22:08:40,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:40,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384039962] [2021-06-05 22:08:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:40,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:40,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384039962] [2021-06-05 22:08:40,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384039962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:40,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884725394] [2021-06-05 22:08:40,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:40,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:40,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:40,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:40,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884725394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:40,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:40,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:40,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723754435] [2021-06-05 22:08:40,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:40,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:40,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:40,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:40,933 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:41,530 INFO L93 Difference]: Finished difference Result 1317 states and 4151 transitions. [2021-06-05 22:08:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:41,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:41,532 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 22:08:41,532 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 22:08:41,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 22:08:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 793. [2021-06-05 22:08:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-05 22:08:41,542 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-05 22:08:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:41,542 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-05 22:08:41,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-05 22:08:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:41,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:41,543 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:41,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5497 [2021-06-05 22:08:41,743 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:41,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:41,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1656497320, now seen corresponding path program 505 times [2021-06-05 22:08:41,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:41,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521149431] [2021-06-05 22:08:41,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:41,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:41,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521149431] [2021-06-05 22:08:41,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521149431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:41,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719813485] [2021-06-05 22:08:41,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:41,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:41,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719813485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:41,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:41,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390452080] [2021-06-05 22:08:41,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:41,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:41,996 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:42,397 INFO L93 Difference]: Finished difference Result 1362 states and 4275 transitions. [2021-06-05 22:08:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:42,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:42,399 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 22:08:42,399 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 22:08:42,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 22:08:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 796. [2021-06-05 22:08:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.4515723270440253) internal successors, (2744), 795 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2744 transitions. [2021-06-05 22:08:42,409 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2744 transitions. Word has length 20 [2021-06-05 22:08:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:42,409 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2744 transitions. [2021-06-05 22:08:42,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2744 transitions. [2021-06-05 22:08:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:42,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:42,410 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:42,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5506,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:42,610 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash -473731240, now seen corresponding path program 506 times [2021-06-05 22:08:42,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:42,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339377624] [2021-06-05 22:08:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:42,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:42,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339377624] [2021-06-05 22:08:42,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339377624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:42,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289200335] [2021-06-05 22:08:42,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:42,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:42,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:42,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:42,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289200335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:42,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:42,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:42,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762023029] [2021-06-05 22:08:42,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:42,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:42,870 INFO L87 Difference]: Start difference. First operand 796 states and 2744 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:43,421 INFO L93 Difference]: Finished difference Result 1393 states and 4360 transitions. [2021-06-05 22:08:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:08:43,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:43,424 INFO L225 Difference]: With dead ends: 1393 [2021-06-05 22:08:43,424 INFO L226 Difference]: Without dead ends: 1393 [2021-06-05 22:08:43,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:08:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-06-05 22:08:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 797. [2021-06-05 22:08:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4547738693467336) internal successors, (2750), 796 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:43,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2750 transitions. [2021-06-05 22:08:43,440 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2750 transitions. Word has length 20 [2021-06-05 22:08:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:43,440 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2750 transitions. [2021-06-05 22:08:43,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2750 transitions. [2021-06-05 22:08:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:43,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:43,441 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:43,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5510,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:43,642 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:43,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:43,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1864099100, now seen corresponding path program 507 times [2021-06-05 22:08:43,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:43,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025543860] [2021-06-05 22:08:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:43,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:43,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025543860] [2021-06-05 22:08:43,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025543860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:43,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218105844] [2021-06-05 22:08:43,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:43,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:43,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:43,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218105844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:43,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:43,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:43,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772999279] [2021-06-05 22:08:43,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:43,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:43,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:43,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:43,896 INFO L87 Difference]: Start difference. First operand 797 states and 2750 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:44,339 INFO L93 Difference]: Finished difference Result 1350 states and 4257 transitions. [2021-06-05 22:08:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:44,341 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 22:08:44,341 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 22:08:44,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 22:08:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 793. [2021-06-05 22:08:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-05 22:08:44,351 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-05 22:08:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:44,351 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-05 22:08:44,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-05 22:08:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:44,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:44,352 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:44,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5517 [2021-06-05 22:08:44,552 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1335697110, now seen corresponding path program 508 times [2021-06-05 22:08:44,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:44,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897972923] [2021-06-05 22:08:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:44,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:44,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897972923] [2021-06-05 22:08:44,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897972923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29496118] [2021-06-05 22:08:44,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:44,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:44,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:44,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29496118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:44,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:44,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:44,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279178898] [2021-06-05 22:08:44,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:44,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:44,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:44,814 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:45,833 INFO L93 Difference]: Finished difference Result 1614 states and 4881 transitions. [2021-06-05 22:08:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:08:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:45,835 INFO L225 Difference]: With dead ends: 1614 [2021-06-05 22:08:45,835 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 22:08:45,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 926.5ms TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:08:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 22:08:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 795. [2021-06-05 22:08:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.452141057934509) internal successors, (2741), 794 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2741 transitions. [2021-06-05 22:08:45,853 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2741 transitions. Word has length 20 [2021-06-05 22:08:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:45,853 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2741 transitions. [2021-06-05 22:08:45,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2741 transitions. [2021-06-05 22:08:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:45,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:45,854 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:46,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:46,054 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:46,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1647343268, now seen corresponding path program 509 times [2021-06-05 22:08:46,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:46,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211504588] [2021-06-05 22:08:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:46,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:46,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211504588] [2021-06-05 22:08:46,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211504588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:46,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326604078] [2021-06-05 22:08:46,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:46,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:46,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:46,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:46,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:46,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326604078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:46,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:46,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:46,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370070090] [2021-06-05 22:08:46,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:46,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:46,373 INFO L87 Difference]: Start difference. First operand 795 states and 2741 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:47,132 INFO L93 Difference]: Finished difference Result 1340 states and 4219 transitions. [2021-06-05 22:08:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:47,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:47,134 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 22:08:47,134 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 22:08:47,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 22:08:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 798. [2021-06-05 22:08:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4579673776662485) internal successors, (2756), 797 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2756 transitions. [2021-06-05 22:08:47,144 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2756 transitions. Word has length 20 [2021-06-05 22:08:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:47,145 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2756 transitions. [2021-06-05 22:08:47,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2756 transitions. [2021-06-05 22:08:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:47,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:47,146 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:47,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5532,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:47,346 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash -584296672, now seen corresponding path program 510 times [2021-06-05 22:08:47,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:47,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347177811] [2021-06-05 22:08:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:47,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:47,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347177811] [2021-06-05 22:08:47,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347177811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:47,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471644884] [2021-06-05 22:08:47,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:47,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:47,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:47,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:47,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:47,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471644884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:47,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:47,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:47,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454302988] [2021-06-05 22:08:47,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:47,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:47,605 INFO L87 Difference]: Start difference. First operand 798 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:48,404 INFO L93 Difference]: Finished difference Result 1502 states and 4647 transitions. [2021-06-05 22:08:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:08:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:48,406 INFO L225 Difference]: With dead ends: 1502 [2021-06-05 22:08:48,406 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 22:08:48,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 725.3ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:08:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 22:08:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 799. [2021-06-05 22:08:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.4611528822055138) internal successors, (2762), 798 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2762 transitions. [2021-06-05 22:08:48,417 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2762 transitions. Word has length 20 [2021-06-05 22:08:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:48,417 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2762 transitions. [2021-06-05 22:08:48,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2762 transitions. [2021-06-05 22:08:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:48,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:48,418 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:48,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-06-05 22:08:48,623 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash 708045728, now seen corresponding path program 511 times [2021-06-05 22:08:48,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:48,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788186328] [2021-06-05 22:08:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:48,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:48,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788186328] [2021-06-05 22:08:48,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788186328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:48,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565278547] [2021-06-05 22:08:48,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:48,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:48,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565278547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:48,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:48,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:48,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868812040] [2021-06-05 22:08:48,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:48,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:48,879 INFO L87 Difference]: Start difference. First operand 799 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:49,614 INFO L93 Difference]: Finished difference Result 1471 states and 4580 transitions. [2021-06-05 22:08:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:08:49,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:49,616 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 22:08:49,616 INFO L226 Difference]: Without dead ends: 1471 [2021-06-05 22:08:49,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 662.9ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:08:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-06-05 22:08:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 798. [2021-06-05 22:08:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4579673776662485) internal successors, (2756), 797 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2756 transitions. [2021-06-05 22:08:49,627 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2756 transitions. Word has length 20 [2021-06-05 22:08:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:49,627 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2756 transitions. [2021-06-05 22:08:49,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2756 transitions. [2021-06-05 22:08:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:49,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:49,628 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:49,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5548,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:49,828 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:49,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1815983226, now seen corresponding path program 512 times [2021-06-05 22:08:49,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:49,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407702401] [2021-06-05 22:08:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:49,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:49,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407702401] [2021-06-05 22:08:49,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407702401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:49,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132725969] [2021-06-05 22:08:49,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:49,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:49,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:49,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:49,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:50,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132725969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:50,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:50,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:50,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206307670] [2021-06-05 22:08:50,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:50,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:50,083 INFO L87 Difference]: Start difference. First operand 798 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:50,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:50,489 INFO L93 Difference]: Finished difference Result 1344 states and 4231 transitions. [2021-06-05 22:08:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:08:50,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:50,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:50,491 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 22:08:50,491 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 22:08:50,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:08:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 22:08:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 800. [2021-06-05 22:08:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.460575719649562) internal successors, (2765), 799 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2765 transitions. [2021-06-05 22:08:50,502 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2765 transitions. Word has length 20 [2021-06-05 22:08:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:50,502 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2765 transitions. [2021-06-05 22:08:50,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2765 transitions. [2021-06-05 22:08:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:50,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:50,503 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:50,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5555,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:50,704 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:50,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1556371972, now seen corresponding path program 513 times [2021-06-05 22:08:50,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:50,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589112178] [2021-06-05 22:08:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:50,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:50,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589112178] [2021-06-05 22:08:50,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589112178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:50,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498961738] [2021-06-05 22:08:50,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:50,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:08:50,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:50,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:50,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:51,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498961738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:51,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:51,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:08:51,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514303207] [2021-06-05 22:08:51,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:08:51,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:08:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:08:51,027 INFO L87 Difference]: Start difference. First operand 800 states and 2765 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:51,514 INFO L93 Difference]: Finished difference Result 1282 states and 4102 transitions. [2021-06-05 22:08:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:51,515 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:51,516 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 22:08:51,516 INFO L226 Difference]: Without dead ends: 1282 [2021-06-05 22:08:51,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:51,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-05 22:08:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 793. [2021-06-05 22:08:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4444444444444446) internal successors, (2728), 792 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2728 transitions. [2021-06-05 22:08:51,526 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2728 transitions. Word has length 20 [2021-06-05 22:08:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:51,526 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2728 transitions. [2021-06-05 22:08:51,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2728 transitions. [2021-06-05 22:08:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:51,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:51,527 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:51,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5563 [2021-06-05 22:08:51,728 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:51,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358622, now seen corresponding path program 514 times [2021-06-05 22:08:51,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:51,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904549701] [2021-06-05 22:08:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:51,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:51,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904549701] [2021-06-05 22:08:51,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904549701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:51,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119811396] [2021-06-05 22:08:51,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:51,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:51,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119811396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:51,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:51,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:08:51,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457318150] [2021-06-05 22:08:51,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:08:51,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:08:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:08:51,967 INFO L87 Difference]: Start difference. First operand 793 states and 2728 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:52,230 INFO L93 Difference]: Finished difference Result 1144 states and 3667 transitions. [2021-06-05 22:08:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:08:52,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:52,231 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 22:08:52,231 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 22:08:52,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 22:08:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-06-05 22:08:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4393939393939394) internal successors, (2724), 792 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2724 transitions. [2021-06-05 22:08:52,241 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2724 transitions. Word has length 20 [2021-06-05 22:08:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:52,241 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2724 transitions. [2021-06-05 22:08:52,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2724 transitions. [2021-06-05 22:08:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:52,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:52,242 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:52,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5574 [2021-06-05 22:08:52,442 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:52,442 INFO L82 PathProgramCache]: Analyzing trace with hash 285793542, now seen corresponding path program 515 times [2021-06-05 22:08:52,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:52,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334255079] [2021-06-05 22:08:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:52,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:52,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334255079] [2021-06-05 22:08:52,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334255079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:52,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779485170] [2021-06-05 22:08:52,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:52,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:52,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:52,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:52,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779485170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:52,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:52,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:52,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008291581] [2021-06-05 22:08:52,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:52,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:52,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:52,699 INFO L87 Difference]: Start difference. First operand 793 states and 2724 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:53,033 INFO L93 Difference]: Finished difference Result 1168 states and 3711 transitions. [2021-06-05 22:08:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:08:53,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:53,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:53,034 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 22:08:53,034 INFO L226 Difference]: Without dead ends: 1154 [2021-06-05 22:08:53,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-05 22:08:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 795. [2021-06-05 22:08:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.4395465994962215) internal successors, (2731), 794 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2731 transitions. [2021-06-05 22:08:53,049 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2731 transitions. Word has length 20 [2021-06-05 22:08:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:53,049 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2731 transitions. [2021-06-05 22:08:53,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2731 transitions. [2021-06-05 22:08:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:53,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:53,050 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:53,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5580,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:53,251 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2011600566, now seen corresponding path program 516 times [2021-06-05 22:08:53,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:53,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125439825] [2021-06-05 22:08:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:53,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:53,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125439825] [2021-06-05 22:08:53,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125439825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:53,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895117663] [2021-06-05 22:08:53,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:53,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:53,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:53,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:53,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895117663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:53,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:53,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:53,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882734759] [2021-06-05 22:08:53,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:53,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:53,507 INFO L87 Difference]: Start difference. First operand 795 states and 2731 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:54,006 INFO L93 Difference]: Finished difference Result 1193 states and 3763 transitions. [2021-06-05 22:08:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:54,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:54,007 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 22:08:54,008 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 22:08:54,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 22:08:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 806. [2021-06-05 22:08:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.4285714285714284) internal successors, (2760), 805 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2760 transitions. [2021-06-05 22:08:54,018 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2760 transitions. Word has length 20 [2021-06-05 22:08:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:54,018 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2760 transitions. [2021-06-05 22:08:54,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2760 transitions. [2021-06-05 22:08:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:54,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:54,019 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:54,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5586 [2021-06-05 22:08:54,219 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:54,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1516520582, now seen corresponding path program 517 times [2021-06-05 22:08:54,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:54,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697686049] [2021-06-05 22:08:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:54,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697686049] [2021-06-05 22:08:54,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697686049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234639555] [2021-06-05 22:08:54,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:54,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234639555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:54,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:54,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:54,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49883241] [2021-06-05 22:08:54,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:54,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:54,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:54,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:54,477 INFO L87 Difference]: Start difference. First operand 806 states and 2760 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:54,784 INFO L93 Difference]: Finished difference Result 1133 states and 3652 transitions. [2021-06-05 22:08:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:54,786 INFO L225 Difference]: With dead ends: 1133 [2021-06-05 22:08:54,786 INFO L226 Difference]: Without dead ends: 1133 [2021-06-05 22:08:54,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-05 22:08:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 789. [2021-06-05 22:08:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.4441624365482233) internal successors, (2714), 788 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2714 transitions. [2021-06-05 22:08:54,795 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2714 transitions. Word has length 20 [2021-06-05 22:08:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:54,795 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2714 transitions. [2021-06-05 22:08:54,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2714 transitions. [2021-06-05 22:08:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:54,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:54,796 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:54,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5594 [2021-06-05 22:08:54,997 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash -284214296, now seen corresponding path program 518 times [2021-06-05 22:08:54,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:54,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897714469] [2021-06-05 22:08:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:55,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897714469] [2021-06-05 22:08:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897714469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134292053] [2021-06-05 22:08:55,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:55,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:55,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134292053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:55,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:55,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:55,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588589444] [2021-06-05 22:08:55,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:55,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:55,242 INFO L87 Difference]: Start difference. First operand 789 states and 2714 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:55,546 INFO L93 Difference]: Finished difference Result 1125 states and 3613 transitions. [2021-06-05 22:08:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:08:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:55,548 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 22:08:55,548 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:08:55,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:08:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 793. [2021-06-05 22:08:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4444444444444446) internal successors, (2728), 792 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2728 transitions. [2021-06-05 22:08:55,557 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2728 transitions. Word has length 20 [2021-06-05 22:08:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:55,557 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2728 transitions. [2021-06-05 22:08:55,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2728 transitions. [2021-06-05 22:08:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:55,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:55,558 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:55,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5599,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:55,758 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1713358892, now seen corresponding path program 519 times [2021-06-05 22:08:55,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:55,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635576466] [2021-06-05 22:08:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:55,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:55,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635576466] [2021-06-05 22:08:55,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635576466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:55,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17653622] [2021-06-05 22:08:55,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:55,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:55,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:55,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:55,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:56,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17653622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:56,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:56,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481896510] [2021-06-05 22:08:56,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:56,004 INFO L87 Difference]: Start difference. First operand 793 states and 2728 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:56,359 INFO L93 Difference]: Finished difference Result 1150 states and 3665 transitions. [2021-06-05 22:08:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:56,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:56,361 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 22:08:56,361 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 22:08:56,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 22:08:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 804. [2021-06-05 22:08:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4333748443337484) internal successors, (2757), 803 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2757 transitions. [2021-06-05 22:08:56,371 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2757 transitions. Word has length 20 [2021-06-05 22:08:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:56,371 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2757 transitions. [2021-06-05 22:08:56,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2757 transitions. [2021-06-05 22:08:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:56,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:56,372 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:56,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5606 [2021-06-05 22:08:56,572 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:56,573 INFO L82 PathProgramCache]: Analyzing trace with hash 946512744, now seen corresponding path program 520 times [2021-06-05 22:08:56,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:56,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072119456] [2021-06-05 22:08:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:56,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:56,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072119456] [2021-06-05 22:08:56,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072119456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:56,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012462471] [2021-06-05 22:08:56,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:56,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:56,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:56,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012462471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:56,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:56,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:08:56,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444065558] [2021-06-05 22:08:56,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:56,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:56,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:56,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:56,822 INFO L87 Difference]: Start difference. First operand 804 states and 2757 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:57,119 INFO L93 Difference]: Finished difference Result 1152 states and 3670 transitions. [2021-06-05 22:08:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:08:57,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:57,121 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 22:08:57,121 INFO L226 Difference]: Without dead ends: 1152 [2021-06-05 22:08:57,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-06-05 22:08:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 791. [2021-06-05 22:08:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4443037974683546) internal successors, (2721), 790 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2721 transitions. [2021-06-05 22:08:57,131 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2721 transitions. Word has length 20 [2021-06-05 22:08:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:57,131 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2721 transitions. [2021-06-05 22:08:57,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2721 transitions. [2021-06-05 22:08:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:57,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:57,132 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:57,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:57,332 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash -501136808, now seen corresponding path program 521 times [2021-06-05 22:08:57,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:57,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550180261] [2021-06-05 22:08:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:57,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:57,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550180261] [2021-06-05 22:08:57,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550180261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:57,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843413357] [2021-06-05 22:08:57,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:57,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:57,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:57,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:57,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:57,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:57,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:57,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:08:57,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-06-05 22:08:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:57,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843413357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:57,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:57,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:08:57,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036080621] [2021-06-05 22:08:57,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:08:57,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:08:57,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:08:57,568 INFO L87 Difference]: Start difference. First operand 791 states and 2721 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:57,826 INFO L93 Difference]: Finished difference Result 1219 states and 3829 transitions. [2021-06-05 22:08:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:08:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:57,827 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 22:08:57,827 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 22:08:57,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 22:08:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 806. [2021-06-05 22:08:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.431055900621118) internal successors, (2762), 805 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2762 transitions. [2021-06-05 22:08:57,838 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2762 transitions. Word has length 20 [2021-06-05 22:08:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:57,838 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2762 transitions. [2021-06-05 22:08:57,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2762 transitions. [2021-06-05 22:08:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:57,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:57,839 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:58,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5617 [2021-06-05 22:08:58,039 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1267982956, now seen corresponding path program 522 times [2021-06-05 22:08:58,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:58,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441602070] [2021-06-05 22:08:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:58,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:58,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441602070] [2021-06-05 22:08:58,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441602070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:58,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733714178] [2021-06-05 22:08:58,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:58,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:58,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:58,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:58,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:58,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:58,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:58,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:08:58,259 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 22:08:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:58,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733714178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:58,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:58,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:08:58,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883717988] [2021-06-05 22:08:58,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:08:58,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:58,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:08:58,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:08:58,280 INFO L87 Difference]: Start difference. First operand 806 states and 2762 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:58,600 INFO L93 Difference]: Finished difference Result 1247 states and 3888 transitions. [2021-06-05 22:08:58,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:58,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:58,602 INFO L225 Difference]: With dead ends: 1247 [2021-06-05 22:08:58,602 INFO L226 Difference]: Without dead ends: 1247 [2021-06-05 22:08:58,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-05 22:08:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 804. [2021-06-05 22:08:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4333748443337484) internal successors, (2757), 803 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2757 transitions. [2021-06-05 22:08:58,612 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2757 transitions. Word has length 20 [2021-06-05 22:08:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:58,612 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2757 transitions. [2021-06-05 22:08:58,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2757 transitions. [2021-06-05 22:08:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:58,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:58,613 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:58,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5624,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:58,814 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash -92492312, now seen corresponding path program 523 times [2021-06-05 22:08:58,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:58,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85877026] [2021-06-05 22:08:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:58,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:58,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85877026] [2021-06-05 22:08:58,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85877026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:58,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417235973] [2021-06-05 22:08:58,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:58,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:58,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:08:59,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:59,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:59,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:59,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:59,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:08:59,028 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 22:08:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:59,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417235973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:59,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:59,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:08:59,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182365504] [2021-06-05 22:08:59,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:08:59,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:59,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:08:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:08:59,038 INFO L87 Difference]: Start difference. First operand 804 states and 2757 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:59,267 INFO L93 Difference]: Finished difference Result 1188 states and 3774 transitions. [2021-06-05 22:08:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:59,268 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 22:08:59,268 INFO L226 Difference]: Without dead ends: 1188 [2021-06-05 22:08:59,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-06-05 22:08:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 791. [2021-06-05 22:08:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4443037974683546) internal successors, (2721), 790 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2721 transitions. [2021-06-05 22:08:59,284 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2721 transitions. Word has length 20 [2021-06-05 22:08:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:59,284 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2721 transitions. [2021-06-05 22:08:59,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2721 transitions. [2021-06-05 22:08:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:59,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:59,285 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:59,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5633,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:59,486 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash 167624360, now seen corresponding path program 524 times [2021-06-05 22:08:59,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:59,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264786984] [2021-06-05 22:08:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:59,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264786984] [2021-06-05 22:08:59,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264786984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:59,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186124780] [2021-06-05 22:08:59,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:59,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:59,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:59,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:08:59,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:59,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186124780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:59,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:59,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:08:59,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378068555] [2021-06-05 22:08:59,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:08:59,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:59,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:08:59,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:08:59,696 INFO L87 Difference]: Start difference. First operand 791 states and 2721 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:59,882 INFO L93 Difference]: Finished difference Result 1189 states and 3834 transitions. [2021-06-05 22:08:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:59,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:08:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:59,884 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 22:08:59,884 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 22:08:59,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 22:08:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 786. [2021-06-05 22:08:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.443312101910828) internal successors, (2703), 785 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2703 transitions. [2021-06-05 22:08:59,893 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2703 transitions. Word has length 20 [2021-06-05 22:08:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:59,894 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2703 transitions. [2021-06-05 22:08:59,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2703 transitions. [2021-06-05 22:08:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:08:59,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:59,895 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:00,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-06-05 22:09:00,095 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:00,095 INFO L82 PathProgramCache]: Analyzing trace with hash -747390040, now seen corresponding path program 525 times [2021-06-05 22:09:00,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:00,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069434291] [2021-06-05 22:09:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:00,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:00,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069434291] [2021-06-05 22:09:00,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069434291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:00,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102849278] [2021-06-05 22:09:00,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:00,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:00,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:00,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:00,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102849278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:00,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:00,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:00,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377122198] [2021-06-05 22:09:00,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:00,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:00,328 INFO L87 Difference]: Start difference. First operand 786 states and 2703 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:00,487 INFO L93 Difference]: Finished difference Result 1178 states and 3806 transitions. [2021-06-05 22:09:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:00,489 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 22:09:00,489 INFO L226 Difference]: Without dead ends: 1178 [2021-06-05 22:09:00,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-05 22:09:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 785. [2021-06-05 22:09:00,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.44515306122449) internal successors, (2701), 784 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2701 transitions. [2021-06-05 22:09:00,498 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2701 transitions. Word has length 20 [2021-06-05 22:09:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:00,498 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2701 transitions. [2021-06-05 22:09:00,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2701 transitions. [2021-06-05 22:09:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:00,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:00,499 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:00,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5643,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:00,713 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:00,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:00,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1514236188, now seen corresponding path program 526 times [2021-06-05 22:09:00,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:00,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237624638] [2021-06-05 22:09:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:00,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:00,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237624638] [2021-06-05 22:09:00,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237624638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:00,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799811266] [2021-06-05 22:09:00,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:00,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:00,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:00,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:00,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799811266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:00,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:00,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:00,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280781354] [2021-06-05 22:09:00,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:00,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:00,949 INFO L87 Difference]: Start difference. First operand 785 states and 2701 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:01,119 INFO L93 Difference]: Finished difference Result 1203 states and 3862 transitions. [2021-06-05 22:09:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:01,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:01,120 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 22:09:01,120 INFO L226 Difference]: Without dead ends: 1203 [2021-06-05 22:09:01,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-06-05 22:09:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 782. [2021-06-05 22:09:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.440460947503201) internal successors, (2687), 781 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2687 transitions. [2021-06-05 22:09:01,129 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2687 transitions. Word has length 20 [2021-06-05 22:09:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:01,130 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2687 transitions. [2021-06-05 22:09:01,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2687 transitions. [2021-06-05 22:09:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:01,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:01,131 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:01,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5647,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:01,331 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:01,331 INFO L82 PathProgramCache]: Analyzing trace with hash 823594152, now seen corresponding path program 527 times [2021-06-05 22:09:01,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:01,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726915307] [2021-06-05 22:09:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:01,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:01,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726915307] [2021-06-05 22:09:01,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726915307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:01,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840678075] [2021-06-05 22:09:01,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:01,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:01,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:01,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:01,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840678075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:01,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:01,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:01,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461196040] [2021-06-05 22:09:01,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:01,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:01,561 INFO L87 Difference]: Start difference. First operand 782 states and 2687 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:01,742 INFO L93 Difference]: Finished difference Result 1160 states and 3759 transitions. [2021-06-05 22:09:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:01,744 INFO L225 Difference]: With dead ends: 1160 [2021-06-05 22:09:01,744 INFO L226 Difference]: Without dead ends: 1160 [2021-06-05 22:09:01,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:01,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-05 22:09:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 770. [2021-06-05 22:09:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.423927178153446) internal successors, (2633), 769 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2633 transitions. [2021-06-05 22:09:01,753 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2633 transitions. Word has length 20 [2021-06-05 22:09:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:01,753 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2633 transitions. [2021-06-05 22:09:01,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2633 transitions. [2021-06-05 22:09:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:01,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:01,754 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:01,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5652 [2021-06-05 22:09:01,954 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2052769820, now seen corresponding path program 528 times [2021-06-05 22:09:01,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:01,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34331347] [2021-06-05 22:09:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:02,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:02,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34331347] [2021-06-05 22:09:02,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34331347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:02,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061726486] [2021-06-05 22:09:02,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:02,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:02,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:02,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:02,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:02,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061726486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:02,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:02,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:02,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163110129] [2021-06-05 22:09:02,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:02,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:02,181 INFO L87 Difference]: Start difference. First operand 770 states and 2633 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:02,355 INFO L93 Difference]: Finished difference Result 1138 states and 3676 transitions. [2021-06-05 22:09:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:02,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:02,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:02,356 INFO L225 Difference]: With dead ends: 1138 [2021-06-05 22:09:02,356 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 22:09:02,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 22:09:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 776. [2021-06-05 22:09:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.432258064516129) internal successors, (2660), 775 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2660 transitions. [2021-06-05 22:09:02,365 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2660 transitions. Word has length 20 [2021-06-05 22:09:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:02,365 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2660 transitions. [2021-06-05 22:09:02,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2660 transitions. [2021-06-05 22:09:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:02,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:02,366 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:02,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5658,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:02,567 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:02,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1285923672, now seen corresponding path program 529 times [2021-06-05 22:09:02,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:02,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070585330] [2021-06-05 22:09:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:02,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:02,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070585330] [2021-06-05 22:09:02,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070585330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:02,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946277342] [2021-06-05 22:09:02,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:02,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:02,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:02,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946277342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:02,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:02,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:02,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803405795] [2021-06-05 22:09:02,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:02,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:02,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:02,793 INFO L87 Difference]: Start difference. First operand 776 states and 2660 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:02,967 INFO L93 Difference]: Finished difference Result 1180 states and 3783 transitions. [2021-06-05 22:09:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:02,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:02,968 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 22:09:02,968 INFO L226 Difference]: Without dead ends: 1180 [2021-06-05 22:09:02,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-06-05 22:09:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 777. [2021-06-05 22:09:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.435567010309278) internal successors, (2666), 776 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2666 transitions. [2021-06-05 22:09:02,978 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2666 transitions. Word has length 20 [2021-06-05 22:09:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:02,978 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2666 transitions. [2021-06-05 22:09:02,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,978 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2666 transitions. [2021-06-05 22:09:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:02,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:02,979 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:03,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5662 [2021-06-05 22:09:03,179 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:03,179 INFO L82 PathProgramCache]: Analyzing trace with hash -671213284, now seen corresponding path program 530 times [2021-06-05 22:09:03,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:03,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817379299] [2021-06-05 22:09:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:03,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:03,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817379299] [2021-06-05 22:09:03,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817379299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:03,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263785428] [2021-06-05 22:09:03,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:03,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:03,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:03,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263785428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:03,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:03,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:03,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957668646] [2021-06-05 22:09:03,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:03,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:03,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:03,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:03,427 INFO L87 Difference]: Start difference. First operand 777 states and 2666 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:03,621 INFO L93 Difference]: Finished difference Result 1147 states and 3706 transitions. [2021-06-05 22:09:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:03,622 INFO L225 Difference]: With dead ends: 1147 [2021-06-05 22:09:03,622 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 22:09:03,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:03,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 22:09:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 773. [2021-06-05 22:09:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.4261658031088085) internal successors, (2645), 772 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2645 transitions. [2021-06-05 22:09:03,632 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2645 transitions. Word has length 20 [2021-06-05 22:09:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:03,632 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2645 transitions. [2021-06-05 22:09:03,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2645 transitions. [2021-06-05 22:09:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:03,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:03,633 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:03,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5667 [2021-06-05 22:09:03,833 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:03,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1833552980, now seen corresponding path program 531 times [2021-06-05 22:09:03,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:03,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324765804] [2021-06-05 22:09:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:03,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324765804] [2021-06-05 22:09:03,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324765804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296350617] [2021-06-05 22:09:03,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:03,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:03,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:03,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:04,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:04,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:04,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,045 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:09:04,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:04,045 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:09:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:04,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296350617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:04,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:04,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:04,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465283416] [2021-06-05 22:09:04,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:04,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:04,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:04,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:04,091 INFO L87 Difference]: Start difference. First operand 773 states and 2645 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:04,315 INFO L93 Difference]: Finished difference Result 1239 states and 3955 transitions. [2021-06-05 22:09:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:04,317 INFO L225 Difference]: With dead ends: 1239 [2021-06-05 22:09:04,317 INFO L226 Difference]: Without dead ends: 1239 [2021-06-05 22:09:04,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-06-05 22:09:04,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 777. [2021-06-05 22:09:04,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.431701030927835) internal successors, (2663), 776 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2663 transitions. [2021-06-05 22:09:04,327 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2663 transitions. Word has length 20 [2021-06-05 22:09:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:04,327 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2663 transitions. [2021-06-05 22:09:04,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2663 transitions. [2021-06-05 22:09:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:04,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:04,328 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:04,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5673 [2021-06-05 22:09:04,529 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash 504277360, now seen corresponding path program 532 times [2021-06-05 22:09:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:04,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416659743] [2021-06-05 22:09:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:04,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:04,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416659743] [2021-06-05 22:09:04,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416659743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:04,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298775335] [2021-06-05 22:09:04,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:04,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:04,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:04,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:04,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:04,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:04,744 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:09:04,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:04,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:09:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:04,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298775335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:04,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:04,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:04,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920225768] [2021-06-05 22:09:04,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:04,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:04,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:04,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:04,790 INFO L87 Difference]: Start difference. First operand 777 states and 2663 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:04,989 INFO L93 Difference]: Finished difference Result 1245 states and 3970 transitions. [2021-06-05 22:09:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:04,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:04,991 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 22:09:04,991 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 22:09:04,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 22:09:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 776. [2021-06-05 22:09:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.4283870967741934) internal successors, (2657), 775 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2657 transitions. [2021-06-05 22:09:05,001 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2657 transitions. Word has length 20 [2021-06-05 22:09:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:05,001 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2657 transitions. [2021-06-05 22:09:05,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2657 transitions. [2021-06-05 22:09:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:05,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:05,002 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:05,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5679,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:05,219 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2117844094, now seen corresponding path program 533 times [2021-06-05 22:09:05,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:05,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795213763] [2021-06-05 22:09:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:05,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795213763] [2021-06-05 22:09:05,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795213763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692065397] [2021-06-05 22:09:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:05,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:05,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:05,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:05,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:05,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:05,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:05,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:05,476 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:09:05,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:05,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:09:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:05,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692065397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:05,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:05,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:05,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746653863] [2021-06-05 22:09:05,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:05,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:05,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:05,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:05,506 INFO L87 Difference]: Start difference. First operand 776 states and 2657 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:05,684 INFO L93 Difference]: Finished difference Result 1203 states and 3863 transitions. [2021-06-05 22:09:05,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:05,686 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 22:09:05,686 INFO L226 Difference]: Without dead ends: 1203 [2021-06-05 22:09:05,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-06-05 22:09:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 773. [2021-06-05 22:09:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.4261658031088085) internal successors, (2645), 772 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2645 transitions. [2021-06-05 22:09:05,696 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2645 transitions. Word has length 20 [2021-06-05 22:09:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:05,696 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2645 transitions. [2021-06-05 22:09:05,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2645 transitions. [2021-06-05 22:09:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:05,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:05,697 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:05,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5687,562 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:05,897 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash -255092834, now seen corresponding path program 534 times [2021-06-05 22:09:05,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:05,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979078194] [2021-06-05 22:09:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:05,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979078194] [2021-06-05 22:09:05,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979078194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251283974] [2021-06-05 22:09:05,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:06,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:06,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:06,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251283974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:06,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:06,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:06,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525687390] [2021-06-05 22:09:06,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:06,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:06,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:06,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:06,156 INFO L87 Difference]: Start difference. First operand 773 states and 2645 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:06,484 INFO L93 Difference]: Finished difference Result 1171 states and 3734 transitions. [2021-06-05 22:09:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:06,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:06,486 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 22:09:06,486 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 22:09:06,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 22:09:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 781. [2021-06-05 22:09:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4294871794871793) internal successors, (2675), 780 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2675 transitions. [2021-06-05 22:09:06,496 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2675 transitions. Word has length 20 [2021-06-05 22:09:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:06,496 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2675 transitions. [2021-06-05 22:09:06,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2675 transitions. [2021-06-05 22:09:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:06,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:06,497 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:06,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5693 [2021-06-05 22:09:06,697 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:06,697 INFO L82 PathProgramCache]: Analyzing trace with hash 453265384, now seen corresponding path program 535 times [2021-06-05 22:09:06,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:06,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834201555] [2021-06-05 22:09:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:06,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:06,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834201555] [2021-06-05 22:09:06,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834201555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:06,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057619184] [2021-06-05 22:09:06,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:06,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:06,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:06,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057619184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:06,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:06,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:06,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854468532] [2021-06-05 22:09:06,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:06,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:06,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:06,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:06,949 INFO L87 Difference]: Start difference. First operand 781 states and 2675 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:07,387 INFO L93 Difference]: Finished difference Result 1237 states and 3901 transitions. [2021-06-05 22:09:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:09:07,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:07,389 INFO L225 Difference]: With dead ends: 1237 [2021-06-05 22:09:07,389 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 22:09:07,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:09:07,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 22:09:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 781. [2021-06-05 22:09:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.437179487179487) internal successors, (2681), 780 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2681 transitions. [2021-06-05 22:09:07,400 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2681 transitions. Word has length 20 [2021-06-05 22:09:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:07,400 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2681 transitions. [2021-06-05 22:09:07,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2681 transitions. [2021-06-05 22:09:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:07,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:07,401 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:07,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5698,564 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:07,601 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1716732652, now seen corresponding path program 536 times [2021-06-05 22:09:07,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:07,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790827011] [2021-06-05 22:09:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:07,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:07,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790827011] [2021-06-05 22:09:07,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790827011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:07,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048857897] [2021-06-05 22:09:07,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:07,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:07,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:07,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:07,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048857897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:07,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:07,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:07,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165228394] [2021-06-05 22:09:07,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:07,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:07,916 INFO L87 Difference]: Start difference. First operand 781 states and 2681 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:08,544 INFO L93 Difference]: Finished difference Result 1192 states and 3776 transitions. [2021-06-05 22:09:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:08,546 INFO L225 Difference]: With dead ends: 1192 [2021-06-05 22:09:08,546 INFO L226 Difference]: Without dead ends: 1178 [2021-06-05 22:09:08,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-05 22:09:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 781. [2021-06-05 22:09:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4346153846153844) internal successors, (2679), 780 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2679 transitions. [2021-06-05 22:09:08,555 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2679 transitions. Word has length 20 [2021-06-05 22:09:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:08,555 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2679 transitions. [2021-06-05 22:09:08,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2679 transitions. [2021-06-05 22:09:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:08,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:08,556 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:08,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5704,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:08,757 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2093035288, now seen corresponding path program 537 times [2021-06-05 22:09:08,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:08,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7617095] [2021-06-05 22:09:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:08,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:08,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7617095] [2021-06-05 22:09:08,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7617095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:08,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278288804] [2021-06-05 22:09:08,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:08,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:08,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:08,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:09,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278288804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:09,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:09,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:09,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853324436] [2021-06-05 22:09:09,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:09,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:09,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:09,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:09,070 INFO L87 Difference]: Start difference. First operand 781 states and 2679 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:09,525 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 22:09:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:09,600 INFO L93 Difference]: Finished difference Result 1243 states and 3905 transitions. [2021-06-05 22:09:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:09,602 INFO L225 Difference]: With dead ends: 1243 [2021-06-05 22:09:09,602 INFO L226 Difference]: Without dead ends: 1243 [2021-06-05 22:09:09,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-06-05 22:09:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 779. [2021-06-05 22:09:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.4344473007712084) internal successors, (2672), 778 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2672 transitions. [2021-06-05 22:09:09,612 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2672 transitions. Word has length 20 [2021-06-05 22:09:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:09,612 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2672 transitions. [2021-06-05 22:09:09,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2672 transitions. [2021-06-05 22:09:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:09,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:09,613 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:09,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5711,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:09,814 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:09,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:09,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1563484264, now seen corresponding path program 538 times [2021-06-05 22:09:09,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:09,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034925842] [2021-06-05 22:09:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:09,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:09,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034925842] [2021-06-05 22:09:09,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034925842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:09,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166478890] [2021-06-05 22:09:09,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:09,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:09,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:09,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:10,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166478890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:10,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:10,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367352575] [2021-06-05 22:09:10,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:10,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:10,072 INFO L87 Difference]: Start difference. First operand 779 states and 2672 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:10,378 INFO L93 Difference]: Finished difference Result 1287 states and 4035 transitions. [2021-06-05 22:09:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:10,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:10,379 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 22:09:10,379 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 22:09:10,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 22:09:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 782. [2021-06-05 22:09:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.440460947503201) internal successors, (2687), 781 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2687 transitions. [2021-06-05 22:09:10,389 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2687 transitions. Word has length 20 [2021-06-05 22:09:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:10,389 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2687 transitions. [2021-06-05 22:09:10,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2687 transitions. [2021-06-05 22:09:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:10,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:10,390 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:10,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5720,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:10,591 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:10,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1548716952, now seen corresponding path program 539 times [2021-06-05 22:09:10,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:10,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686146716] [2021-06-05 22:09:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:10,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:10,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686146716] [2021-06-05 22:09:10,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686146716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:10,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163979646] [2021-06-05 22:09:10,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:10,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:10,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163979646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:10,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:10,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:10,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772197727] [2021-06-05 22:09:10,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:10,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:10,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:10,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:10,859 INFO L87 Difference]: Start difference. First operand 782 states and 2687 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:11,203 INFO L93 Difference]: Finished difference Result 1318 states and 4120 transitions. [2021-06-05 22:09:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:11,205 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 22:09:11,205 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 22:09:11,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 22:09:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 783. [2021-06-05 22:09:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4437340153452687) internal successors, (2693), 782 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2693 transitions. [2021-06-05 22:09:11,215 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2693 transitions. Word has length 20 [2021-06-05 22:09:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:11,215 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2693 transitions. [2021-06-05 22:09:11,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2693 transitions. [2021-06-05 22:09:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:11,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:11,216 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:11,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5724,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:11,416 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash 789113388, now seen corresponding path program 540 times [2021-06-05 22:09:11,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:11,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665119348] [2021-06-05 22:09:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:11,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:11,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665119348] [2021-06-05 22:09:11,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665119348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:11,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672886657] [2021-06-05 22:09:11,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:11,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:11,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:11,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:11,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672886657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:11,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:11,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:11,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190614598] [2021-06-05 22:09:11,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:11,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:11,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:11,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:11,671 INFO L87 Difference]: Start difference. First operand 783 states and 2693 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:12,022 INFO L93 Difference]: Finished difference Result 1275 states and 4017 transitions. [2021-06-05 22:09:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:12,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:12,024 INFO L225 Difference]: With dead ends: 1275 [2021-06-05 22:09:12,024 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 22:09:12,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 22:09:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 779. [2021-06-05 22:09:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.4344473007712084) internal successors, (2672), 778 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2672 transitions. [2021-06-05 22:09:12,034 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2672 transitions. Word has length 20 [2021-06-05 22:09:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:12,034 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2672 transitions. [2021-06-05 22:09:12,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2672 transitions. [2021-06-05 22:09:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:12,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:12,035 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:12,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5731,569 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:12,235 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:12,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:12,235 INFO L82 PathProgramCache]: Analyzing trace with hash 389872236, now seen corresponding path program 541 times [2021-06-05 22:09:12,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:12,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059043723] [2021-06-05 22:09:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:12,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:12,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059043723] [2021-06-05 22:09:12,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059043723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:12,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009067816] [2021-06-05 22:09:12,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:12,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009067816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:12,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:12,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:12,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709726226] [2021-06-05 22:09:12,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:12,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:12,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:12,565 INFO L87 Difference]: Start difference. First operand 779 states and 2672 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:13,320 INFO L93 Difference]: Finished difference Result 1376 states and 4195 transitions. [2021-06-05 22:09:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:09:13,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:13,322 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 22:09:13,322 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 22:09:13,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 705.9ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:09:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 22:09:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 792. [2021-06-05 22:09:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4285714285714284) internal successors, (2712), 791 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2712 transitions. [2021-06-05 22:09:13,333 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2712 transitions. Word has length 20 [2021-06-05 22:09:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:13,333 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2712 transitions. [2021-06-05 22:09:13,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2712 transitions. [2021-06-05 22:09:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:13,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:13,334 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:13,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5737,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:13,534 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:13,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1884284474, now seen corresponding path program 542 times [2021-06-05 22:09:13,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:13,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124838479] [2021-06-05 22:09:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:13,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:13,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124838479] [2021-06-05 22:09:13,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124838479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:13,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227776859] [2021-06-05 22:09:13,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:13,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:13,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:13,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:13,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227776859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:13,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:13,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:13,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797734738] [2021-06-05 22:09:13,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:13,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:13,791 INFO L87 Difference]: Start difference. First operand 792 states and 2712 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:14,319 INFO L93 Difference]: Finished difference Result 1535 states and 4603 transitions. [2021-06-05 22:09:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:09:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:14,321 INFO L225 Difference]: With dead ends: 1535 [2021-06-05 22:09:14,321 INFO L226 Difference]: Without dead ends: 1535 [2021-06-05 22:09:14,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:09:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-05 22:09:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 793. [2021-06-05 22:09:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4318181818181817) internal successors, (2718), 792 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2718 transitions. [2021-06-05 22:09:14,338 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2718 transitions. Word has length 20 [2021-06-05 22:09:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:14,338 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2718 transitions. [2021-06-05 22:09:14,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2718 transitions. [2021-06-05 22:09:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:14,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:14,339 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:14,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5746 [2021-06-05 22:09:14,540 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:14,540 INFO L82 PathProgramCache]: Analyzing trace with hash 390376752, now seen corresponding path program 543 times [2021-06-05 22:09:14,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:14,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209914624] [2021-06-05 22:09:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:14,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:14,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209914624] [2021-06-05 22:09:14,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209914624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:14,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714330464] [2021-06-05 22:09:14,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:14,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:14,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:14,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:14,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:14,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714330464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:14,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:14,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:14,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703911181] [2021-06-05 22:09:14,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:14,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:14,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:14,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:14,792 INFO L87 Difference]: Start difference. First operand 793 states and 2718 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:15,065 INFO L93 Difference]: Finished difference Result 1298 states and 4047 transitions. [2021-06-05 22:09:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:15,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:15,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:15,066 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 22:09:15,066 INFO L226 Difference]: Without dead ends: 1292 [2021-06-05 22:09:15,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:15,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-06-05 22:09:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 802. [2021-06-05 22:09:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4232209737827715) internal successors, (2742), 801 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2742 transitions. [2021-06-05 22:09:15,077 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2742 transitions. Word has length 20 [2021-06-05 22:09:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:15,077 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2742 transitions. [2021-06-05 22:09:15,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2742 transitions. [2021-06-05 22:09:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:15,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:15,078 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:15,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5754,572 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:15,279 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:15,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1050566082, now seen corresponding path program 544 times [2021-06-05 22:09:15,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:15,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121108142] [2021-06-05 22:09:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:15,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:15,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121108142] [2021-06-05 22:09:15,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121108142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:15,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713503103] [2021-06-05 22:09:15,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:15,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:15,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:15,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:15,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713503103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:15,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:15,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:15,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220512137] [2021-06-05 22:09:15,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:15,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:15,601 INFO L87 Difference]: Start difference. First operand 802 states and 2742 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:16,187 INFO L93 Difference]: Finished difference Result 1326 states and 4108 transitions. [2021-06-05 22:09:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:16,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:16,189 INFO L225 Difference]: With dead ends: 1326 [2021-06-05 22:09:16,189 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 22:09:16,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 540.9ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:09:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 22:09:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 799. [2021-06-05 22:09:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.426065162907268) internal successors, (2734), 798 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2734 transitions. [2021-06-05 22:09:16,200 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2734 transitions. Word has length 20 [2021-06-05 22:09:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:16,200 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2734 transitions. [2021-06-05 22:09:16,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2734 transitions. [2021-06-05 22:09:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:16,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:16,201 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:16,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 573 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5761 [2021-06-05 22:09:16,401 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:16,401 INFO L82 PathProgramCache]: Analyzing trace with hash -795264508, now seen corresponding path program 545 times [2021-06-05 22:09:16,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:16,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517494733] [2021-06-05 22:09:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:16,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:16,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517494733] [2021-06-05 22:09:16,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517494733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:16,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679206219] [2021-06-05 22:09:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:16,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:16,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:16,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:16,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679206219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:16,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:16,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:16,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726248968] [2021-06-05 22:09:16,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:16,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:16,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:16,699 INFO L87 Difference]: Start difference. First operand 799 states and 2734 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:17,236 INFO L93 Difference]: Finished difference Result 1325 states and 4089 transitions. [2021-06-05 22:09:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:09:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:17,238 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 22:09:17,238 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 22:09:17,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:09:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 22:09:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 803. [2021-06-05 22:09:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.42643391521197) internal successors, (2748), 802 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2748 transitions. [2021-06-05 22:09:17,249 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2748 transitions. Word has length 20 [2021-06-05 22:09:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:17,249 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2748 transitions. [2021-06-05 22:09:17,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2748 transitions. [2021-06-05 22:09:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:17,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:17,250 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:17,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-06-05 22:09:17,456 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1572638316, now seen corresponding path program 546 times [2021-06-05 22:09:17,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:17,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918428372] [2021-06-05 22:09:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:17,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:17,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918428372] [2021-06-05 22:09:17,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918428372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:17,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143539841] [2021-06-05 22:09:17,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:17,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:17,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:17,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:17,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:17,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143539841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:17,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:17,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:17,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578705400] [2021-06-05 22:09:17,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:17,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:17,786 INFO L87 Difference]: Start difference. First operand 803 states and 2748 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:18,320 INFO L93 Difference]: Finished difference Result 1347 states and 4164 transitions. [2021-06-05 22:09:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:09:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:18,322 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 22:09:18,322 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 22:09:18,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 510.4ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 22:09:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 801. [2021-06-05 22:09:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.42875) internal successors, (2743), 800 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2743 transitions. [2021-06-05 22:09:18,333 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2743 transitions. Word has length 20 [2021-06-05 22:09:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:18,333 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2743 transitions. [2021-06-05 22:09:18,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2743 transitions. [2021-06-05 22:09:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:18,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:18,334 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:18,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5783 [2021-06-05 22:09:18,540 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:18,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1659282384, now seen corresponding path program 547 times [2021-06-05 22:09:18,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:18,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475376172] [2021-06-05 22:09:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:18,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475376172] [2021-06-05 22:09:18,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475376172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807387965] [2021-06-05 22:09:18,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:18,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:18,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807387965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:18,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:18,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:18,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114472346] [2021-06-05 22:09:18,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:18,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:18,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:18,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:18,807 INFO L87 Difference]: Start difference. First operand 801 states and 2743 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:19,271 INFO L93 Difference]: Finished difference Result 1485 states and 4530 transitions. [2021-06-05 22:09:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:09:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:19,273 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 22:09:19,273 INFO L226 Difference]: Without dead ends: 1485 [2021-06-05 22:09:19,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:09:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-06-05 22:09:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 802. [2021-06-05 22:09:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.431960049937578) internal successors, (2749), 801 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2749 transitions. [2021-06-05 22:09:19,285 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2749 transitions. Word has length 20 [2021-06-05 22:09:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:19,285 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2749 transitions. [2021-06-05 22:09:19,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2749 transitions. [2021-06-05 22:09:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:19,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:19,286 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:19,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5795 [2021-06-05 22:09:19,487 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash -366939984, now seen corresponding path program 548 times [2021-06-05 22:09:19,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:19,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345484407] [2021-06-05 22:09:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:19,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:19,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345484407] [2021-06-05 22:09:19,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345484407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:19,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535207007] [2021-06-05 22:09:19,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:19,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:19,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:19,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:19,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:19,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535207007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:19,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:19,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:19,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537437947] [2021-06-05 22:09:19,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:19,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:19,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:19,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:19,761 INFO L87 Difference]: Start difference. First operand 802 states and 2749 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:20,249 INFO L93 Difference]: Finished difference Result 1454 states and 4463 transitions. [2021-06-05 22:09:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:09:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:20,251 INFO L225 Difference]: With dead ends: 1454 [2021-06-05 22:09:20,251 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 22:09:20,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:09:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 22:09:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 801. [2021-06-05 22:09:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.42875) internal successors, (2743), 800 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2743 transitions. [2021-06-05 22:09:20,262 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2743 transitions. Word has length 20 [2021-06-05 22:09:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:20,262 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2743 transitions. [2021-06-05 22:09:20,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2743 transitions. [2021-06-05 22:09:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:20,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:20,263 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:20,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5802,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:20,464 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1638545856, now seen corresponding path program 549 times [2021-06-05 22:09:20,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:20,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538691461] [2021-06-05 22:09:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:20,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538691461] [2021-06-05 22:09:20,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538691461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525535752] [2021-06-05 22:09:20,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:20,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:20,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:20,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:20,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525535752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:20,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:20,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:20,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315722912] [2021-06-05 22:09:20,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:20,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:20,743 INFO L87 Difference]: Start difference. First operand 801 states and 2743 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:21,015 INFO L93 Difference]: Finished difference Result 1202 states and 3819 transitions. [2021-06-05 22:09:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:21,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:21,017 INFO L225 Difference]: With dead ends: 1202 [2021-06-05 22:09:21,017 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 22:09:21,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:21,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 22:09:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 805. [2021-06-05 22:09:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.4291044776119404) internal successors, (2757), 804 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2757 transitions. [2021-06-05 22:09:21,028 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2757 transitions. Word has length 20 [2021-06-05 22:09:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:21,028 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2757 transitions. [2021-06-05 22:09:21,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2757 transitions. [2021-06-05 22:09:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:21,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:21,029 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:21,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:21,241 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:21,241 INFO L82 PathProgramCache]: Analyzing trace with hash 740997514, now seen corresponding path program 550 times [2021-06-05 22:09:21,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:21,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318738922] [2021-06-05 22:09:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:21,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318738922] [2021-06-05 22:09:21,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318738922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536030206] [2021-06-05 22:09:21,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:21,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:21,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:21,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:21,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536030206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:21,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:21,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:21,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869539231] [2021-06-05 22:09:21,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:21,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:21,502 INFO L87 Difference]: Start difference. First operand 805 states and 2757 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:22,121 INFO L93 Difference]: Finished difference Result 1526 states and 4597 transitions. [2021-06-05 22:09:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:09:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:22,123 INFO L225 Difference]: With dead ends: 1526 [2021-06-05 22:09:22,123 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 22:09:22,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 515.8ms TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:09:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 22:09:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 803. [2021-06-05 22:09:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.43142144638404) internal successors, (2752), 802 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2752 transitions. [2021-06-05 22:09:22,135 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2752 transitions. Word has length 20 [2021-06-05 22:09:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:22,135 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2752 transitions. [2021-06-05 22:09:22,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2752 transitions. [2021-06-05 22:09:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:22,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:22,136 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:22,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5818,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:22,336 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:22,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1142951508, now seen corresponding path program 551 times [2021-06-05 22:09:22,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:22,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376292987] [2021-06-05 22:09:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:22,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:22,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376292987] [2021-06-05 22:09:22,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376292987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:22,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713798104] [2021-06-05 22:09:22,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:22,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:22,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:22,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:22,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713798104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:22,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:22,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755251889] [2021-06-05 22:09:22,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:22,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:22,655 INFO L87 Difference]: Start difference. First operand 803 states and 2752 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:23,077 INFO L93 Difference]: Finished difference Result 1288 states and 4026 transitions. [2021-06-05 22:09:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:23,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:23,079 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 22:09:23,079 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 22:09:23,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 22:09:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 800. [2021-06-05 22:09:23,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.4267834793491865) internal successors, (2738), 799 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2738 transitions. [2021-06-05 22:09:23,089 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2738 transitions. Word has length 20 [2021-06-05 22:09:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:23,090 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2738 transitions. [2021-06-05 22:09:23,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2738 transitions. [2021-06-05 22:09:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:23,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:23,090 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:23,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5826 [2021-06-05 22:09:23,291 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash 481386260, now seen corresponding path program 552 times [2021-06-05 22:09:23,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:23,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714784283] [2021-06-05 22:09:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:23,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:23,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714784283] [2021-06-05 22:09:23,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714784283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:23,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912048595] [2021-06-05 22:09:23,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:23,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:23,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:23,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912048595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:23,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:23,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043193441] [2021-06-05 22:09:23,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:23,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:23,603 INFO L87 Difference]: Start difference. First operand 800 states and 2738 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:24,043 INFO L93 Difference]: Finished difference Result 1278 states and 4000 transitions. [2021-06-05 22:09:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:24,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:24,045 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 22:09:24,045 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 22:09:24,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 22:09:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 788. [2021-06-05 22:09:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.42566709021601) internal successors, (2696), 787 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2696 transitions. [2021-06-05 22:09:24,055 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2696 transitions. Word has length 20 [2021-06-05 22:09:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:24,055 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2696 transitions. [2021-06-05 22:09:24,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2696 transitions. [2021-06-05 22:09:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:24,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:24,056 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:24,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5843,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:24,257 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1517456554, now seen corresponding path program 553 times [2021-06-05 22:09:24,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:24,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974785564] [2021-06-05 22:09:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:24,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974785564] [2021-06-05 22:09:24,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974785564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864580143] [2021-06-05 22:09:24,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864580143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:24,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:24,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276568784] [2021-06-05 22:09:24,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:24,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:24,535 INFO L87 Difference]: Start difference. First operand 788 states and 2696 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:24,856 INFO L93 Difference]: Finished difference Result 1233 states and 3868 transitions. [2021-06-05 22:09:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:24,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:24,857 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 22:09:24,857 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 22:09:24,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 22:09:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 788. [2021-06-05 22:09:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.4231257941550193) internal successors, (2694), 787 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2694 transitions. [2021-06-05 22:09:24,868 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2694 transitions. Word has length 20 [2021-06-05 22:09:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:24,868 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2694 transitions. [2021-06-05 22:09:24,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2694 transitions. [2021-06-05 22:09:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:24,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:24,869 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:25,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:25,069 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:25,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1141153918, now seen corresponding path program 554 times [2021-06-05 22:09:25,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:25,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747244137] [2021-06-05 22:09:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:25,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:25,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747244137] [2021-06-05 22:09:25,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747244137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:25,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646479724] [2021-06-05 22:09:25,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:25,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:25,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646479724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:25,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:25,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984159480] [2021-06-05 22:09:25,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:25,342 INFO L87 Difference]: Start difference. First operand 788 states and 2694 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:25,677 INFO L93 Difference]: Finished difference Result 1311 states and 4044 transitions. [2021-06-05 22:09:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:25,679 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 22:09:25,679 INFO L226 Difference]: Without dead ends: 1311 [2021-06-05 22:09:25,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-06-05 22:09:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 784. [2021-06-05 22:09:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.422733077905492) internal successors, (2680), 783 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2680 transitions. [2021-06-05 22:09:25,689 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2680 transitions. Word has length 20 [2021-06-05 22:09:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:25,689 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2680 transitions. [2021-06-05 22:09:25,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2680 transitions. [2021-06-05 22:09:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:25,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:25,690 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:25,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5859 [2021-06-05 22:09:25,891 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:25,891 INFO L82 PathProgramCache]: Analyzing trace with hash 290550556, now seen corresponding path program 555 times [2021-06-05 22:09:25,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:25,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185637569] [2021-06-05 22:09:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:25,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:25,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185637569] [2021-06-05 22:09:25,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185637569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:25,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495530909] [2021-06-05 22:09:25,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:26,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:26,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495530909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:26,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:26,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:26,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995894094] [2021-06-05 22:09:26,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:26,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:26,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:26,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:26,138 INFO L87 Difference]: Start difference. First operand 784 states and 2680 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:26,339 INFO L93 Difference]: Finished difference Result 1235 states and 3915 transitions. [2021-06-05 22:09:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:26,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:26,341 INFO L225 Difference]: With dead ends: 1235 [2021-06-05 22:09:26,341 INFO L226 Difference]: Without dead ends: 1235 [2021-06-05 22:09:26,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-06-05 22:09:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 782. [2021-06-05 22:09:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.4199743918053778) internal successors, (2671), 781 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2671 transitions. [2021-06-05 22:09:26,351 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2671 transitions. Word has length 20 [2021-06-05 22:09:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:26,351 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2671 transitions. [2021-06-05 22:09:26,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2671 transitions. [2021-06-05 22:09:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:26,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:26,352 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:26,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:26,552 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:26,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:26,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1473316636, now seen corresponding path program 556 times [2021-06-05 22:09:26,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:26,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167837816] [2021-06-05 22:09:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:26,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:26,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167837816] [2021-06-05 22:09:26,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167837816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:26,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305084731] [2021-06-05 22:09:26,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:26,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:26,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:26,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305084731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:26,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:26,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898349226] [2021-06-05 22:09:26,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:26,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:26,806 INFO L87 Difference]: Start difference. First operand 782 states and 2671 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:27,098 INFO L93 Difference]: Finished difference Result 1264 states and 3978 transitions. [2021-06-05 22:09:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:27,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:27,099 INFO L225 Difference]: With dead ends: 1264 [2021-06-05 22:09:27,099 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 22:09:27,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 22:09:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 779. [2021-06-05 22:09:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.4151670951156814) internal successors, (2657), 778 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2657 transitions. [2021-06-05 22:09:27,110 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2657 transitions. Word has length 20 [2021-06-05 22:09:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:27,110 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2657 transitions. [2021-06-05 22:09:27,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2657 transitions. [2021-06-05 22:09:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:27,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:27,111 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:27,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5869 [2021-06-05 22:09:27,311 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:27,311 INFO L82 PathProgramCache]: Analyzing trace with hash -483820320, now seen corresponding path program 557 times [2021-06-05 22:09:27,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:27,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223210228] [2021-06-05 22:09:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:27,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:27,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223210228] [2021-06-05 22:09:27,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223210228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:27,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533679535] [2021-06-05 22:09:27,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:27,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:27,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:27,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:27,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533679535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:27,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:27,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:27,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876381503] [2021-06-05 22:09:27,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:27,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:27,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:27,555 INFO L87 Difference]: Start difference. First operand 779 states and 2657 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:27,759 INFO L93 Difference]: Finished difference Result 1221 states and 3881 transitions. [2021-06-05 22:09:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:27,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:27,761 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 22:09:27,761 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 22:09:27,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 22:09:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 767. [2021-06-05 22:09:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.412532637075718) internal successors, (2614), 766 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2614 transitions. [2021-06-05 22:09:27,771 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2614 transitions. Word has length 20 [2021-06-05 22:09:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:27,771 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2614 transitions. [2021-06-05 22:09:27,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2614 transitions. [2021-06-05 22:09:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:27,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:27,772 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:27,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5874,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:27,972 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1133715308, now seen corresponding path program 558 times [2021-06-05 22:09:27,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:27,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484832903] [2021-06-05 22:09:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:28,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484832903] [2021-06-05 22:09:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484832903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204810428] [2021-06-05 22:09:28,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:28,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:28,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:28,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:28,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:28,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,205 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:09:28,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:28,206 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:09:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:28,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204810428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:28,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:28,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:28,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969126252] [2021-06-05 22:09:28,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:28,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:28,233 INFO L87 Difference]: Start difference. First operand 767 states and 2614 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:28,470 INFO L93 Difference]: Finished difference Result 1329 states and 4168 transitions. [2021-06-05 22:09:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:28,472 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 22:09:28,472 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 22:09:28,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 22:09:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 771. [2021-06-05 22:09:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.418181818181818) internal successors, (2632), 770 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2632 transitions. [2021-06-05 22:09:28,483 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2632 transitions. Word has length 20 [2021-06-05 22:09:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:28,483 INFO L482 AbstractCegarLoop]: Abstraction has 771 states and 2632 transitions. [2021-06-05 22:09:28,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2632 transitions. [2021-06-05 22:09:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:28,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:28,484 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:28,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5879 [2021-06-05 22:09:28,684 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash -823421648, now seen corresponding path program 559 times [2021-06-05 22:09:28,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:28,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349454397] [2021-06-05 22:09:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:28,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349454397] [2021-06-05 22:09:28,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349454397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484745894] [2021-06-05 22:09:28,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:28,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:28,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:28,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:28,940 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:09:28,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:28,941 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:09:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:28,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484745894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:28,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:28,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:28,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411477196] [2021-06-05 22:09:28,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:28,967 INFO L87 Difference]: Start difference. First operand 771 states and 2632 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:29,184 INFO L93 Difference]: Finished difference Result 1331 states and 4172 transitions. [2021-06-05 22:09:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:29,185 INFO L225 Difference]: With dead ends: 1331 [2021-06-05 22:09:29,185 INFO L226 Difference]: Without dead ends: 1331 [2021-06-05 22:09:29,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-05 22:09:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 770. [2021-06-05 22:09:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.4148244473342) internal successors, (2626), 769 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2626 transitions. [2021-06-05 22:09:29,196 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2626 transitions. Word has length 20 [2021-06-05 22:09:29,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:29,196 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2626 transitions. [2021-06-05 22:09:29,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2626 transitions. [2021-06-05 22:09:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:29,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:29,197 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:29,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5885,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:29,397 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash 790145086, now seen corresponding path program 560 times [2021-06-05 22:09:29,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:29,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889843965] [2021-06-05 22:09:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:29,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:29,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889843965] [2021-06-05 22:09:29,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889843965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:29,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428285056] [2021-06-05 22:09:29,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:29,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:29,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:29,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:29,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:29,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:29,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:29,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:29,628 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:09:29,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:29,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:09:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:29,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428285056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:29,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:29,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:29,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128871815] [2021-06-05 22:09:29,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:29,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:29,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:29,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:29,659 INFO L87 Difference]: Start difference. First operand 770 states and 2626 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:29,889 INFO L93 Difference]: Finished difference Result 1280 states and 4035 transitions. [2021-06-05 22:09:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:29,891 INFO L225 Difference]: With dead ends: 1280 [2021-06-05 22:09:29,891 INFO L226 Difference]: Without dead ends: 1280 [2021-06-05 22:09:29,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-06-05 22:09:29,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 764. [2021-06-05 22:09:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.4102228047182175) internal successors, (2602), 763 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2602 transitions. [2021-06-05 22:09:29,901 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2602 transitions. Word has length 20 [2021-06-05 22:09:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:29,901 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2602 transitions. [2021-06-05 22:09:29,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2602 transitions. [2021-06-05 22:09:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:29,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:29,902 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:30,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5891 [2021-06-05 22:09:30,102 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash -237271706, now seen corresponding path program 561 times [2021-06-05 22:09:30,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:30,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963526446] [2021-06-05 22:09:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:30,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:30,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963526446] [2021-06-05 22:09:30,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963526446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:30,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546540400] [2021-06-05 22:09:30,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:30,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:30,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:30,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:30,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:30,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:30,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:30,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:30,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:30,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:30,353 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 22:09:30,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:30,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:30,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:30,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:30,364 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 22:09:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:30,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546540400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:30,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:30,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:30,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341845026] [2021-06-05 22:09:30,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:30,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:30,428 INFO L87 Difference]: Start difference. First operand 764 states and 2602 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:30,969 INFO L93 Difference]: Finished difference Result 1593 states and 4768 transitions. [2021-06-05 22:09:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:09:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:30,971 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 22:09:30,971 INFO L226 Difference]: Without dead ends: 1593 [2021-06-05 22:09:30,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:09:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-06-05 22:09:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 769. [2021-06-05 22:09:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.4205729166666665) internal successors, (2627), 768 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2627 transitions. [2021-06-05 22:09:30,983 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2627 transitions. Word has length 20 [2021-06-05 22:09:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:30,983 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2627 transitions. [2021-06-05 22:09:30,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2627 transitions. [2021-06-05 22:09:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:30,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:30,984 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:31,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5897 [2021-06-05 22:09:31,184 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:31,184 INFO L82 PathProgramCache]: Analyzing trace with hash -548917864, now seen corresponding path program 562 times [2021-06-05 22:09:31,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:31,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572800566] [2021-06-05 22:09:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:31,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:31,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572800566] [2021-06-05 22:09:31,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572800566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:31,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033563857] [2021-06-05 22:09:31,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:31,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:31,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:31,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:31,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:31,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:31,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:31,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,474 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 22:09:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:31,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,496 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:09:31,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:31,497 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:91, output treesize:20 [2021-06-05 22:09:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:31,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033563857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:31,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:31,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:31,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640692523] [2021-06-05 22:09:31,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:31,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:31,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:31,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:31,557 INFO L87 Difference]: Start difference. First operand 769 states and 2627 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:32,119 INFO L93 Difference]: Finished difference Result 1472 states and 4481 transitions. [2021-06-05 22:09:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:09:32,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:32,121 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 22:09:32,121 INFO L226 Difference]: Without dead ends: 1472 [2021-06-05 22:09:32,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 533.4ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:09:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-05 22:09:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 773. [2021-06-05 22:09:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.428756476683938) internal successors, (2647), 772 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2647 transitions. [2021-06-05 22:09:32,133 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2647 transitions. Word has length 20 [2021-06-05 22:09:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:32,133 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2647 transitions. [2021-06-05 22:09:32,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2647 transitions. [2021-06-05 22:09:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:32,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:32,134 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:32,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5910,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:32,334 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:32,334 INFO L82 PathProgramCache]: Analyzing trace with hash 514128732, now seen corresponding path program 563 times [2021-06-05 22:09:32,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:32,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72847604] [2021-06-05 22:09:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:32,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72847604] [2021-06-05 22:09:32,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72847604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493038190] [2021-06-05 22:09:32,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:32,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:32,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:32,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:32,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:32,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:09:32,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,591 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-05 22:09:32,592 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-06-05 22:09:32,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:32,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:32,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:32,616 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 22:09:32,616 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:09:32,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:32,616 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:09:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:32,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493038190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:32,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:32,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:32,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709701904] [2021-06-05 22:09:32,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:32,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:32,677 INFO L87 Difference]: Start difference. First operand 773 states and 2647 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:33,129 INFO L93 Difference]: Finished difference Result 1600 states and 4830 transitions. [2021-06-05 22:09:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:09:33,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:33,131 INFO L225 Difference]: With dead ends: 1600 [2021-06-05 22:09:33,131 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 22:09:33,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:09:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 22:09:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 774. [2021-06-05 22:09:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.4320827943078913) internal successors, (2653), 773 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2653 transitions. [2021-06-05 22:09:33,143 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2653 transitions. Word has length 20 [2021-06-05 22:09:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:33,143 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2653 transitions. [2021-06-05 22:09:33,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2653 transitions. [2021-06-05 22:09:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:33,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:33,144 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:33,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5923 [2021-06-05 22:09:33,360 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:33,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1806471132, now seen corresponding path program 564 times [2021-06-05 22:09:33,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:33,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403587148] [2021-06-05 22:09:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:33,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:33,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403587148] [2021-06-05 22:09:33,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403587148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:33,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478292092] [2021-06-05 22:09:33,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:33,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:33,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:33,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:33,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:33,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:33,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:33,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:09:33,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:33,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:33,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:33,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:33,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:33,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:33,621 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:09:33,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:33,622 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:09:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:33,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478292092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:33,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:33,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:33,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035008196] [2021-06-05 22:09:33,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:33,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:33,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:33,698 INFO L87 Difference]: Start difference. First operand 774 states and 2653 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:34,151 INFO L93 Difference]: Finished difference Result 1569 states and 4763 transitions. [2021-06-05 22:09:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:09:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:34,154 INFO L225 Difference]: With dead ends: 1569 [2021-06-05 22:09:34,154 INFO L226 Difference]: Without dead ends: 1569 [2021-06-05 22:09:34,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:09:34,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-06-05 22:09:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 773. [2021-06-05 22:09:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.428756476683938) internal successors, (2647), 772 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2647 transitions. [2021-06-05 22:09:34,165 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2647 transitions. Word has length 20 [2021-06-05 22:09:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:34,165 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2647 transitions. [2021-06-05 22:09:34,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2647 transitions. [2021-06-05 22:09:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:34,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:34,166 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:34,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5934,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:34,366 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1380558666, now seen corresponding path program 565 times [2021-06-05 22:09:34,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:34,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684293973] [2021-06-05 22:09:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:34,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:34,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684293973] [2021-06-05 22:09:34,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684293973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:34,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766742119] [2021-06-05 22:09:34,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:34,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:34,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:34,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:34,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:09:34,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,619 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 22:09:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:34,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:34,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:34,643 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:09:34,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:34,643 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 22:09:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:34,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766742119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:34,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:34,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:34,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668789247] [2021-06-05 22:09:34,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:34,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:34,700 INFO L87 Difference]: Start difference. First operand 773 states and 2647 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:35,592 INFO L93 Difference]: Finished difference Result 1860 states and 5396 transitions. [2021-06-05 22:09:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:09:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:35,594 INFO L225 Difference]: With dead ends: 1860 [2021-06-05 22:09:35,594 INFO L226 Difference]: Without dead ends: 1860 [2021-06-05 22:09:35,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 800.0ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:09:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-05 22:09:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 773. [2021-06-05 22:09:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.433937823834197) internal successors, (2651), 772 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2651 transitions. [2021-06-05 22:09:35,607 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2651 transitions. Word has length 20 [2021-06-05 22:09:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:35,607 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2651 transitions. [2021-06-05 22:09:35,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2651 transitions. [2021-06-05 22:09:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:35,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:35,608 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:35,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5944,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:35,808 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1640169920, now seen corresponding path program 566 times [2021-06-05 22:09:35,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:35,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020998779] [2021-06-05 22:09:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:35,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020998779] [2021-06-05 22:09:35,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020998779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058896929] [2021-06-05 22:09:35,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:35,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:35,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:36,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:36,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:36,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:36,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:36,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:36,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:36,083 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 22:09:36,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:36,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:36,104 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:09:36,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:36,105 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 22:09:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:36,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058896929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:36,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:36,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:36,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644067653] [2021-06-05 22:09:36,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:36,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:36,166 INFO L87 Difference]: Start difference. First operand 773 states and 2651 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:36,682 INFO L93 Difference]: Finished difference Result 1423 states and 4404 transitions. [2021-06-05 22:09:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:36,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:36,684 INFO L225 Difference]: With dead ends: 1423 [2021-06-05 22:09:36,684 INFO L226 Difference]: Without dead ends: 1423 [2021-06-05 22:09:36,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-05 22:09:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 772. [2021-06-05 22:09:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.430609597924773) internal successors, (2645), 771 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2645 transitions. [2021-06-05 22:09:36,695 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2645 transitions. Word has length 20 [2021-06-05 22:09:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:36,695 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2645 transitions. [2021-06-05 22:09:36,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2645 transitions. [2021-06-05 22:09:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:36,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:36,696 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:36,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5958 [2021-06-05 22:09:36,896 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:36,897 INFO L82 PathProgramCache]: Analyzing trace with hash -734282022, now seen corresponding path program 567 times [2021-06-05 22:09:36,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:36,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518141259] [2021-06-05 22:09:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:36,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:36,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518141259] [2021-06-05 22:09:36,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518141259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:36,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800606914] [2021-06-05 22:09:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:37,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:37,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:37,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:37,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:37,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:37,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:37,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:37,168 INFO L628 ElimStorePlain]: treesize reduction 14, result has 65.9 percent of original size [2021-06-05 22:09:37,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:37,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:37,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:37,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:37,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 [2021-06-05 22:09:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:37,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800606914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:37,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:37,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:37,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8652832] [2021-06-05 22:09:37,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:37,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:37,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:37,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:37,220 INFO L87 Difference]: Start difference. First operand 772 states and 2645 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:37,587 INFO L93 Difference]: Finished difference Result 1390 states and 4297 transitions. [2021-06-05 22:09:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:37,589 INFO L225 Difference]: With dead ends: 1390 [2021-06-05 22:09:37,589 INFO L226 Difference]: Without dead ends: 1383 [2021-06-05 22:09:37,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-06-05 22:09:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 787. [2021-06-05 22:09:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.4173027989821882) internal successors, (2686), 786 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2686 transitions. [2021-06-05 22:09:37,600 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2686 transitions. Word has length 20 [2021-06-05 22:09:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:37,600 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2686 transitions. [2021-06-05 22:09:37,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2686 transitions. [2021-06-05 22:09:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:37,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:37,601 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:37,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5970 [2021-06-05 22:09:37,802 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:37,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:37,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1633620802, now seen corresponding path program 568 times [2021-06-05 22:09:37,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:37,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977126259] [2021-06-05 22:09:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:37,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:37,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977126259] [2021-06-05 22:09:37,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977126259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:37,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233765984] [2021-06-05 22:09:37,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:37,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:37,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:37,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:37,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:38,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:38,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:38,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:38,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,082 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 22:09:38,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:38,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,104 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:09:38,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:38,104 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 22:09:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:38,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233765984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:38,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:38,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:38,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373830351] [2021-06-05 22:09:38,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:38,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:38,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:38,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:38,145 INFO L87 Difference]: Start difference. First operand 787 states and 2686 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:38,589 INFO L93 Difference]: Finished difference Result 1471 states and 4494 transitions. [2021-06-05 22:09:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:09:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:38,591 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 22:09:38,591 INFO L226 Difference]: Without dead ends: 1471 [2021-06-05 22:09:38,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-06-05 22:09:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 785. [2021-06-05 22:09:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.419642857142857) internal successors, (2681), 784 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2681 transitions. [2021-06-05 22:09:38,603 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2681 transitions. Word has length 20 [2021-06-05 22:09:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:38,603 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2681 transitions. [2021-06-05 22:09:38,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2681 transitions. [2021-06-05 22:09:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:38,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:38,604 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:38,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5986 [2021-06-05 22:09:38,805 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -888519192, now seen corresponding path program 569 times [2021-06-05 22:09:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:38,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090152448] [2021-06-05 22:09:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:38,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:38,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090152448] [2021-06-05 22:09:38,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090152448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:38,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882894320] [2021-06-05 22:09:38,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:39,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:39,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:39,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:39,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:39,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:39,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,164 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2021-06-05 22:09:39,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-06-05 22:09:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:39,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:39,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,185 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:09:39,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:39,186 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 22:09:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:39,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882894320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:39,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:39,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:39,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430172998] [2021-06-05 22:09:39,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:39,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:39,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:39,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:39,215 INFO L87 Difference]: Start difference. First operand 785 states and 2681 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:39,489 INFO L93 Difference]: Finished difference Result 1418 states and 4385 transitions. [2021-06-05 22:09:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:39,491 INFO L225 Difference]: With dead ends: 1418 [2021-06-05 22:09:39,491 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 22:09:39,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 22:09:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 783. [2021-06-05 22:09:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.421994884910486) internal successors, (2676), 782 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2676 transitions. [2021-06-05 22:09:39,502 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2676 transitions. Word has length 20 [2021-06-05 22:09:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:39,502 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2676 transitions. [2021-06-05 22:09:39,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2676 transitions. [2021-06-05 22:09:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:39,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:39,503 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:39,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5999,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:39,704 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2020785624, now seen corresponding path program 570 times [2021-06-05 22:09:39,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:39,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963816285] [2021-06-05 22:09:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:39,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963816285] [2021-06-05 22:09:39,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963816285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315202388] [2021-06-05 22:09:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:39,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:39,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:39,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:39,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:39,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:39,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:39,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:39,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,962 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 22:09:39,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:39,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:39,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:39,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:39,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 22:09:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:40,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315202388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:40,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:40,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:40,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127882569] [2021-06-05 22:09:40,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:40,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:40,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:40,039 INFO L87 Difference]: Start difference. First operand 783 states and 2676 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:40,361 INFO L93 Difference]: Finished difference Result 1490 states and 4597 transitions. [2021-06-05 22:09:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:40,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:40,363 INFO L225 Difference]: With dead ends: 1490 [2021-06-05 22:09:40,363 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 22:09:40,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 22:09:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 782. [2021-06-05 22:09:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.41741357234315) internal successors, (2669), 781 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2669 transitions. [2021-06-05 22:09:40,374 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2669 transitions. Word has length 20 [2021-06-05 22:09:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:40,374 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2669 transitions. [2021-06-05 22:09:40,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2669 transitions. [2021-06-05 22:09:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:40,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:40,375 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:40,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6012 [2021-06-05 22:09:40,576 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash -728443224, now seen corresponding path program 571 times [2021-06-05 22:09:40,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:40,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223739325] [2021-06-05 22:09:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:40,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:40,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223739325] [2021-06-05 22:09:40,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223739325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:40,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005165760] [2021-06-05 22:09:40,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:40,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:40,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:40,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:40,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,806 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:09:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:40,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:40,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:40,817 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:09:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:40,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005165760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:40,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:40,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:40,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061051363] [2021-06-05 22:09:40,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:40,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:40,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:40,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:40,874 INFO L87 Difference]: Start difference. First operand 782 states and 2669 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:41,191 INFO L93 Difference]: Finished difference Result 1490 states and 4592 transitions. [2021-06-05 22:09:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:41,193 INFO L225 Difference]: With dead ends: 1490 [2021-06-05 22:09:41,193 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 22:09:41,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 22:09:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 779. [2021-06-05 22:09:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.411311053984576) internal successors, (2654), 778 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2654 transitions. [2021-06-05 22:09:41,205 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2654 transitions. Word has length 20 [2021-06-05 22:09:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:41,205 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2654 transitions. [2021-06-05 22:09:41,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2654 transitions. [2021-06-05 22:09:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:41,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:41,206 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:41,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6025 [2021-06-05 22:09:41,406 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:41,406 INFO L82 PathProgramCache]: Analyzing trace with hash -687771078, now seen corresponding path program 572 times [2021-06-05 22:09:41,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:41,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078959257] [2021-06-05 22:09:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:41,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:41,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078959257] [2021-06-05 22:09:41,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078959257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:41,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161647904] [2021-06-05 22:09:41,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:41,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:41,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:41,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:41,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:09:41,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,656 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 22:09:41,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:41,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:41,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,678 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:09:41,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:41,678 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 22:09:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:41,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161647904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:41,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:41,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:41,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307609442] [2021-06-05 22:09:41,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:41,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:41,727 INFO L87 Difference]: Start difference. First operand 779 states and 2654 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:42,105 INFO L93 Difference]: Finished difference Result 1461 states and 4526 transitions. [2021-06-05 22:09:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:09:42,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:42,107 INFO L225 Difference]: With dead ends: 1461 [2021-06-05 22:09:42,107 INFO L226 Difference]: Without dead ends: 1461 [2021-06-05 22:09:42,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:09:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-06-05 22:09:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 776. [2021-06-05 22:09:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.4090322580645163) internal successors, (2642), 775 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2642 transitions. [2021-06-05 22:09:42,117 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2642 transitions. Word has length 20 [2021-06-05 22:09:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:42,117 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2642 transitions. [2021-06-05 22:09:42,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2642 transitions. [2021-06-05 22:09:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:42,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:42,118 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:42,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6036 [2021-06-05 22:09:42,319 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1027461022, now seen corresponding path program 573 times [2021-06-05 22:09:42,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:42,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963761207] [2021-06-05 22:09:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:42,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:42,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963761207] [2021-06-05 22:09:42,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963761207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:42,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345196627] [2021-06-05 22:09:42,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:42,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:42,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:42,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:42,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:42,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:42,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:42,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:09:42,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:42,576 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 22:09:42,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:42,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:42,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:42,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:42,598 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:09:42,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:42,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 22:09:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:42,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345196627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:42,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:42,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:42,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77992556] [2021-06-05 22:09:42,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:42,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:42,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:42,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:42,638 INFO L87 Difference]: Start difference. First operand 776 states and 2642 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:42,915 INFO L93 Difference]: Finished difference Result 1283 states and 4012 transitions. [2021-06-05 22:09:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:09:42,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:42,917 INFO L225 Difference]: With dead ends: 1283 [2021-06-05 22:09:42,917 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 22:09:42,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:09:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 22:09:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 790. [2021-06-05 22:09:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.3979721166032952) internal successors, (2681), 789 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2681 transitions. [2021-06-05 22:09:42,927 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2681 transitions. Word has length 20 [2021-06-05 22:09:42,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:42,927 INFO L482 AbstractCegarLoop]: Abstraction has 790 states and 2681 transitions. [2021-06-05 22:09:42,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2681 transitions. [2021-06-05 22:09:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:42,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:42,928 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:43,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6049,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:43,129 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash -887962904, now seen corresponding path program 574 times [2021-06-05 22:09:43,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:43,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068787377] [2021-06-05 22:09:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:43,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:43,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068787377] [2021-06-05 22:09:43,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068787377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:43,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215498632] [2021-06-05 22:09:43,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:43,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:43,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:43,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:43,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:43,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:43,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,367 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-06-05 22:09:43,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:43,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,389 INFO L628 ElimStorePlain]: treesize reduction 10, result has 73.0 percent of original size [2021-06-05 22:09:43,389 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-06-05 22:09:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:43,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:43,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:43,400 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 22:09:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:43,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215498632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:43,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:43,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:43,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708086416] [2021-06-05 22:09:43,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:43,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:43,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:43,441 INFO L87 Difference]: Start difference. First operand 790 states and 2681 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:44,126 INFO L93 Difference]: Finished difference Result 1588 states and 4739 transitions. [2021-06-05 22:09:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:09:44,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:44,128 INFO L225 Difference]: With dead ends: 1588 [2021-06-05 22:09:44,128 INFO L226 Difference]: Without dead ends: 1588 [2021-06-05 22:09:44,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=249, Invalid=621, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:09:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-06-05 22:09:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 788. [2021-06-05 22:09:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.400254129606099) internal successors, (2676), 787 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2676 transitions. [2021-06-05 22:09:44,140 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2676 transitions. Word has length 20 [2021-06-05 22:09:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:44,140 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2676 transitions. [2021-06-05 22:09:44,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2676 transitions. [2021-06-05 22:09:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:44,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:44,141 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:44,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6063 [2021-06-05 22:09:44,342 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2078306972, now seen corresponding path program 575 times [2021-06-05 22:09:44,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:44,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452149818] [2021-06-05 22:09:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:44,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:44,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452149818] [2021-06-05 22:09:44,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452149818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:44,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393479305] [2021-06-05 22:09:44,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:44,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:44,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:44,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:44,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:44,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:44,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:44,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:44,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:44,577 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-06-05 22:09:44,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:09:44,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:44,597 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-06-05 22:09:44,597 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:09:44,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:44,598 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:09:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:44,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393479305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:44,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:44,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:09:44,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631102827] [2021-06-05 22:09:44,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:09:44,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:09:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:09:44,625 INFO L87 Difference]: Start difference. First operand 788 states and 2676 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:44,912 INFO L93 Difference]: Finished difference Result 1339 states and 4158 transitions. [2021-06-05 22:09:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:44,914 INFO L225 Difference]: With dead ends: 1339 [2021-06-05 22:09:44,914 INFO L226 Difference]: Without dead ends: 1339 [2021-06-05 22:09:44,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-06-05 22:09:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 776. [2021-06-05 22:09:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.4090322580645163) internal successors, (2642), 775 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2642 transitions. [2021-06-05 22:09:44,924 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2642 transitions. Word has length 20 [2021-06-05 22:09:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:44,924 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2642 transitions. [2021-06-05 22:09:44,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2642 transitions. [2021-06-05 22:09:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:44,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:44,925 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:45,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6073,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:45,125 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:45,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1570059884, now seen corresponding path program 576 times [2021-06-05 22:09:45,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:45,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108448558] [2021-06-05 22:09:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:45,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:45,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108448558] [2021-06-05 22:09:45,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108448558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:45,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094638355] [2021-06-05 22:09:45,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:45,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:45,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:45,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:45,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:45,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:45,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:45,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:45,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:45,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:45,395 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 22:09:45,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:45,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:45,416 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:09:45,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:45,417 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 22:09:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:45,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094638355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:45,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:45,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:09:45,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852377615] [2021-06-05 22:09:45,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:09:45,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:45,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:09:45,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:09:45,474 INFO L87 Difference]: Start difference. First operand 776 states and 2642 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:45,864 INFO L93 Difference]: Finished difference Result 1281 states and 4033 transitions. [2021-06-05 22:09:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:45,866 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 22:09:45,866 INFO L226 Difference]: Without dead ends: 1281 [2021-06-05 22:09:45,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-05 22:09:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 773. [2021-06-05 22:09:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.4028497409326426) internal successors, (2627), 772 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2627 transitions. [2021-06-05 22:09:45,876 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2627 transitions. Word has length 20 [2021-06-05 22:09:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:45,876 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2627 transitions. [2021-06-05 22:09:45,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2627 transitions. [2021-06-05 22:09:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:45,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:45,877 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:46,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6084,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:46,078 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:46,078 INFO L82 PathProgramCache]: Analyzing trace with hash -529824086, now seen corresponding path program 577 times [2021-06-05 22:09:46,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:46,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303576300] [2021-06-05 22:09:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:46,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:46,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303576300] [2021-06-05 22:09:46,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303576300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:46,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089902523] [2021-06-05 22:09:46,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:46,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:46,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:09:46,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:09:46,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:46,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:46,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,364 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 22:09:46,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:09:46,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,386 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:09:46,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:46,386 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:91, output treesize:20 [2021-06-05 22:09:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:46,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089902523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:46,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:46,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:46,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210944869] [2021-06-05 22:09:46,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:46,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:46,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:46,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:46,429 INFO L87 Difference]: Start difference. First operand 773 states and 2627 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:46,755 INFO L93 Difference]: Finished difference Result 1281 states and 4024 transitions. [2021-06-05 22:09:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:09:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:46,757 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 22:09:46,757 INFO L226 Difference]: Without dead ends: 1281 [2021-06-05 22:09:46,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:46,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-05 22:09:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 761. [2021-06-05 22:09:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.4092105263157895) internal successors, (2591), 760 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2591 transitions. [2021-06-05 22:09:46,767 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2591 transitions. Word has length 20 [2021-06-05 22:09:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:46,767 INFO L482 AbstractCegarLoop]: Abstraction has 761 states and 2591 transitions. [2021-06-05 22:09:46,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2591 transitions. [2021-06-05 22:09:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:46,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:46,768 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:46,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-06-05 22:09:46,968 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:46,969 INFO L82 PathProgramCache]: Analyzing trace with hash 268626584, now seen corresponding path program 578 times [2021-06-05 22:09:46,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:46,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757042461] [2021-06-05 22:09:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:47,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:47,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757042461] [2021-06-05 22:09:47,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757042461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:47,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27271876] [2021-06-05 22:09:47,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:47,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:47,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:47,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:47,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27271876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:47,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:47,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:47,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478473467] [2021-06-05 22:09:47,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:47,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:47,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:47,198 INFO L87 Difference]: Start difference. First operand 761 states and 2591 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:47,430 INFO L93 Difference]: Finished difference Result 1042 states and 3320 transitions. [2021-06-05 22:09:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:47,431 INFO L225 Difference]: With dead ends: 1042 [2021-06-05 22:09:47,431 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 22:09:47,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 22:09:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 761. [2021-06-05 22:09:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.4092105263157895) internal successors, (2591), 760 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2591 transitions. [2021-06-05 22:09:47,440 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2591 transitions. Word has length 20 [2021-06-05 22:09:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:47,440 INFO L482 AbstractCegarLoop]: Abstraction has 761 states and 2591 transitions. [2021-06-05 22:09:47,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2591 transitions. [2021-06-05 22:09:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:47,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:47,441 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:47,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6108 [2021-06-05 22:09:47,641 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash 976984802, now seen corresponding path program 579 times [2021-06-05 22:09:47,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:47,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585336323] [2021-06-05 22:09:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:47,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:47,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585336323] [2021-06-05 22:09:47,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585336323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:47,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721220547] [2021-06-05 22:09:47,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:47,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721220547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:47,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:47,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:47,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651855196] [2021-06-05 22:09:47,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:47,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:47,874 INFO L87 Difference]: Start difference. First operand 761 states and 2591 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:48,177 INFO L93 Difference]: Finished difference Result 1136 states and 3568 transitions. [2021-06-05 22:09:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:09:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:48,179 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:09:48,179 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 22:09:48,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 22:09:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 758. [2021-06-05 22:09:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.4121532364597096) internal successors, (2583), 757 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2583 transitions. [2021-06-05 22:09:48,188 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2583 transitions. Word has length 20 [2021-06-05 22:09:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:48,188 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2583 transitions. [2021-06-05 22:09:48,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2583 transitions. [2021-06-05 22:09:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:48,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:48,189 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:48,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6110,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:48,389 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:48,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1670755740, now seen corresponding path program 580 times [2021-06-05 22:09:48,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:48,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933839049] [2021-06-05 22:09:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:48,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933839049] [2021-06-05 22:09:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933839049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86715421] [2021-06-05 22:09:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:48,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:48,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86715421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:48,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:48,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:48,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914515241] [2021-06-05 22:09:48,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:48,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:48,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:48,622 INFO L87 Difference]: Start difference. First operand 758 states and 2583 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:48,834 INFO L93 Difference]: Finished difference Result 1091 states and 3440 transitions. [2021-06-05 22:09:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:48,835 INFO L225 Difference]: With dead ends: 1091 [2021-06-05 22:09:48,835 INFO L226 Difference]: Without dead ends: 1084 [2021-06-05 22:09:48,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-06-05 22:09:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 777. [2021-06-05 22:09:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.408505154639175) internal successors, (2645), 776 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2645 transitions. [2021-06-05 22:09:48,845 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2645 transitions. Word has length 20 [2021-06-05 22:09:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:48,845 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2645 transitions. [2021-06-05 22:09:48,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2645 transitions. [2021-06-05 22:09:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:48,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:48,846 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:49,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6116,609 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:49,046 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1129799318, now seen corresponding path program 581 times [2021-06-05 22:09:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:49,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446643233] [2021-06-05 22:09:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:49,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446643233] [2021-06-05 22:09:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446643233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:49,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217462537] [2021-06-05 22:09:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:49,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:49,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217462537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:49,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:49,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:49,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240348273] [2021-06-05 22:09:49,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:49,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:49,301 INFO L87 Difference]: Start difference. First operand 777 states and 2645 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:49,504 INFO L93 Difference]: Finished difference Result 1083 states and 3419 transitions. [2021-06-05 22:09:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:49,506 INFO L225 Difference]: With dead ends: 1083 [2021-06-05 22:09:49,506 INFO L226 Difference]: Without dead ends: 1083 [2021-06-05 22:09:49,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-06-05 22:09:49,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 777. [2021-06-05 22:09:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.408505154639175) internal successors, (2645), 776 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2645 transitions. [2021-06-05 22:09:49,515 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2645 transitions. Word has length 20 [2021-06-05 22:09:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:49,515 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2645 transitions. [2021-06-05 22:09:49,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2645 transitions. [2021-06-05 22:09:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:49,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:49,516 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:49,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6121,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:49,717 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1671260256, now seen corresponding path program 582 times [2021-06-05 22:09:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:49,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310322567] [2021-06-05 22:09:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:49,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:49,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310322567] [2021-06-05 22:09:49,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310322567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:49,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86124730] [2021-06-05 22:09:49,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:49,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:49,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:49,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:49,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86124730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:49,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:49,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:49,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163341039] [2021-06-05 22:09:49,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:49,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:49,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:49,963 INFO L87 Difference]: Start difference. First operand 777 states and 2645 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:50,221 INFO L93 Difference]: Finished difference Result 1070 states and 3379 transitions. [2021-06-05 22:09:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:50,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:50,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:50,223 INFO L225 Difference]: With dead ends: 1070 [2021-06-05 22:09:50,223 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 22:09:50,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 22:09:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 777. [2021-06-05 22:09:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.404639175257732) internal successors, (2642), 776 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2642 transitions. [2021-06-05 22:09:50,232 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2642 transitions. Word has length 20 [2021-06-05 22:09:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:50,232 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2642 transitions. [2021-06-05 22:09:50,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2642 transitions. [2021-06-05 22:09:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:50,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:50,233 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:50,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6126,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:50,433 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:50,434 INFO L82 PathProgramCache]: Analyzing trace with hash 230317422, now seen corresponding path program 583 times [2021-06-05 22:09:50,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:50,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175795804] [2021-06-05 22:09:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:50,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:50,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175795804] [2021-06-05 22:09:50,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175795804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:50,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126599210] [2021-06-05 22:09:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:50,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126599210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:50,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:50,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:50,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370882160] [2021-06-05 22:09:50,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:50,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:50,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:50,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:50,666 INFO L87 Difference]: Start difference. First operand 777 states and 2642 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:50,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:50,871 INFO L93 Difference]: Finished difference Result 1034 states and 3305 transitions. [2021-06-05 22:09:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:50,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:50,872 INFO L225 Difference]: With dead ends: 1034 [2021-06-05 22:09:50,873 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 22:09:50,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 22:09:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 774. [2021-06-05 22:09:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.407503234152652) internal successors, (2634), 773 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2634 transitions. [2021-06-05 22:09:50,881 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2634 transitions. Word has length 20 [2021-06-05 22:09:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:50,881 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2634 transitions. [2021-06-05 22:09:50,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2634 transitions. [2021-06-05 22:09:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:50,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:50,882 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:51,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6132 [2021-06-05 22:09:51,083 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:51,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2085851462, now seen corresponding path program 584 times [2021-06-05 22:09:51,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:51,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972358663] [2021-06-05 22:09:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:51,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:51,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972358663] [2021-06-05 22:09:51,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972358663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914566304] [2021-06-05 22:09:51,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:51,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:51,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:51,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:51,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914566304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:51,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:51,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:09:51,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461123886] [2021-06-05 22:09:51,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:09:51,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:09:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:09:51,330 INFO L87 Difference]: Start difference. First operand 774 states and 2634 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:51,549 INFO L93 Difference]: Finished difference Result 963 states and 3128 transitions. [2021-06-05 22:09:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:51,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:51,551 INFO L225 Difference]: With dead ends: 963 [2021-06-05 22:09:51,551 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 22:09:51,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 22:09:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 774. [2021-06-05 22:09:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.403622250970246) internal successors, (2631), 773 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2631 transitions. [2021-06-05 22:09:51,559 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2631 transitions. Word has length 20 [2021-06-05 22:09:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:51,559 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2631 transitions. [2021-06-05 22:09:51,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:51,559 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2631 transitions. [2021-06-05 22:09:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:51,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:51,560 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:51,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6138,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:51,760 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1915853338, now seen corresponding path program 585 times [2021-06-05 22:09:51,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:51,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234525051] [2021-06-05 22:09:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:51,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:51,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234525051] [2021-06-05 22:09:51,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234525051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:51,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525870838] [2021-06-05 22:09:51,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:51,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:09:51,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:51,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:51,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525870838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:51,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:51,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:09:51,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314226927] [2021-06-05 22:09:51,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:09:51,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:09:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:09:51,998 INFO L87 Difference]: Start difference. First operand 774 states and 2631 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:52,199 INFO L93 Difference]: Finished difference Result 965 states and 3137 transitions. [2021-06-05 22:09:52,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:52,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:52,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:52,200 INFO L225 Difference]: With dead ends: 965 [2021-06-05 22:09:52,200 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 22:09:52,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:09:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 22:09:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 755. [2021-06-05 22:09:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.4151193633952253) internal successors, (2575), 754 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2575 transitions. [2021-06-05 22:09:52,209 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2575 transitions. Word has length 20 [2021-06-05 22:09:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:52,209 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2575 transitions. [2021-06-05 22:09:52,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2575 transitions. [2021-06-05 22:09:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:52,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:52,210 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:52,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6143,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:52,410 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 809941774, now seen corresponding path program 586 times [2021-06-05 22:09:52,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:52,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571916974] [2021-06-05 22:09:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:52,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:52,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571916974] [2021-06-05 22:09:52,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571916974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:52,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113825007] [2021-06-05 22:09:52,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:52,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:52,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:52,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113825007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:52,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:52,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:52,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58762822] [2021-06-05 22:09:52,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:52,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:52,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:52,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:52,686 INFO L87 Difference]: Start difference. First operand 755 states and 2575 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:52,934 INFO L93 Difference]: Finished difference Result 1078 states and 3417 transitions. [2021-06-05 22:09:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:52,935 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 22:09:52,935 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 22:09:52,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 22:09:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 759. [2021-06-05 22:09:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.4195250659630605) internal successors, (2592), 758 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2592 transitions. [2021-06-05 22:09:52,944 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2592 transitions. Word has length 20 [2021-06-05 22:09:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:52,944 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2592 transitions. [2021-06-05 22:09:52,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2592 transitions. [2021-06-05 22:09:52,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:52,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:52,945 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:53,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6145 [2021-06-05 22:09:53,146 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:53,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1518299992, now seen corresponding path program 587 times [2021-06-05 22:09:53,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:53,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541110351] [2021-06-05 22:09:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:53,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:53,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541110351] [2021-06-05 22:09:53,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541110351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:53,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759805948] [2021-06-05 22:09:53,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:53,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:53,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:53,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:53,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:53,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759805948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:53,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:53,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:53,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669909923] [2021-06-05 22:09:53,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:53,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:53,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:53,419 INFO L87 Difference]: Start difference. First operand 759 states and 2592 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:53,929 INFO L93 Difference]: Finished difference Result 1353 states and 4079 transitions. [2021-06-05 22:09:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:09:53,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:53,931 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 22:09:53,931 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 22:09:53,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:09:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 22:09:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 762. [2021-06-05 22:09:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4244415243101183) internal successors, (2606), 761 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2606 transitions. [2021-06-05 22:09:53,942 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2606 transitions. Word has length 20 [2021-06-05 22:09:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:53,942 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2606 transitions. [2021-06-05 22:09:53,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2606 transitions. [2021-06-05 22:09:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:53,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:53,943 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:54,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6149,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:54,143 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:54,144 INFO L82 PathProgramCache]: Analyzing trace with hash -651698044, now seen corresponding path program 588 times [2021-06-05 22:09:54,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:54,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999234393] [2021-06-05 22:09:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:54,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999234393] [2021-06-05 22:09:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999234393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508388847] [2021-06-05 22:09:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:54,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:54,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:54,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508388847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:54,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:54,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:54,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923744393] [2021-06-05 22:09:54,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:54,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:54,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:54,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:54,422 INFO L87 Difference]: Start difference. First operand 762 states and 2606 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:54,782 INFO L93 Difference]: Finished difference Result 1018 states and 3260 transitions. [2021-06-05 22:09:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:09:54,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:54,784 INFO L225 Difference]: With dead ends: 1018 [2021-06-05 22:09:54,784 INFO L226 Difference]: Without dead ends: 1004 [2021-06-05 22:09:54,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-06-05 22:09:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 760. [2021-06-05 22:09:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.421607378129117) internal successors, (2597), 759 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2597 transitions. [2021-06-05 22:09:54,792 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2597 transitions. Word has length 20 [2021-06-05 22:09:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:54,792 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2597 transitions. [2021-06-05 22:09:54,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:54,792 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2597 transitions. [2021-06-05 22:09:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:54,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:54,793 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:54,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6156 [2021-06-05 22:09:54,994 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1666448424, now seen corresponding path program 589 times [2021-06-05 22:09:54,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:54,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076963200] [2021-06-05 22:09:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:55,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076963200] [2021-06-05 22:09:55,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076963200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:55,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692377573] [2021-06-05 22:09:55,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:55,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692377573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:55,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:55,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:55,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423772193] [2021-06-05 22:09:55,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:55,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:55,268 INFO L87 Difference]: Start difference. First operand 760 states and 2597 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:55,521 INFO L93 Difference]: Finished difference Result 1133 states and 3555 transitions. [2021-06-05 22:09:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:55,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:55,523 INFO L225 Difference]: With dead ends: 1133 [2021-06-05 22:09:55,523 INFO L226 Difference]: Without dead ends: 1133 [2021-06-05 22:09:55,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-05 22:09:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 756. [2021-06-05 22:09:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.418543046357616) internal successors, (2581), 755 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2581 transitions. [2021-06-05 22:09:55,532 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2581 transitions. Word has length 20 [2021-06-05 22:09:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:55,532 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2581 transitions. [2021-06-05 22:09:55,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2581 transitions. [2021-06-05 22:09:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:55,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:55,533 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:55,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6163,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:55,733 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash -483682344, now seen corresponding path program 590 times [2021-06-05 22:09:55,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:55,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269002444] [2021-06-05 22:09:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:55,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269002444] [2021-06-05 22:09:55,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269002444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942775692] [2021-06-05 22:09:55,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:55,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:55,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:55,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:55,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:56,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942775692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:56,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:56,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:56,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688525095] [2021-06-05 22:09:56,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:56,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:56,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:56,000 INFO L87 Difference]: Start difference. First operand 756 states and 2581 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:56,363 INFO L93 Difference]: Finished difference Result 1145 states and 3584 transitions. [2021-06-05 22:09:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:56,364 INFO L225 Difference]: With dead ends: 1145 [2021-06-05 22:09:56,364 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 22:09:56,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 22:09:56,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 757. [2021-06-05 22:09:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.421957671957672) internal successors, (2587), 756 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2587 transitions. [2021-06-05 22:09:56,373 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2587 transitions. Word has length 20 [2021-06-05 22:09:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:56,373 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2587 transitions. [2021-06-05 22:09:56,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2587 transitions. [2021-06-05 22:09:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:56,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:56,374 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:56,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-06-05 22:09:56,575 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:56,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1854147996, now seen corresponding path program 591 times [2021-06-05 22:09:56,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:56,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855672212] [2021-06-05 22:09:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:56,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:56,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855672212] [2021-06-05 22:09:56,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855672212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:56,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267239922] [2021-06-05 22:09:56,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:56,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:56,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:56,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:56,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267239922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:56,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:56,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:56,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16668067] [2021-06-05 22:09:56,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:56,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:56,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:56,873 INFO L87 Difference]: Start difference. First operand 757 states and 2587 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:57,166 INFO L93 Difference]: Finished difference Result 1112 states and 3507 transitions. [2021-06-05 22:09:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:09:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:57,168 INFO L225 Difference]: With dead ends: 1112 [2021-06-05 22:09:57,168 INFO L226 Difference]: Without dead ends: 1112 [2021-06-05 22:09:57,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-05 22:09:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 753. [2021-06-05 22:09:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.4122340425531914) internal successors, (2566), 752 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2566 transitions. [2021-06-05 22:09:57,176 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2566 transitions. Word has length 20 [2021-06-05 22:09:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:57,176 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2566 transitions. [2021-06-05 22:09:57,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2566 transitions. [2021-06-05 22:09:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:57,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:57,177 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:57,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6175,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:57,389 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:57,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1345648214, now seen corresponding path program 592 times [2021-06-05 22:09:57,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:57,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058814997] [2021-06-05 22:09:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:57,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:57,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058814997] [2021-06-05 22:09:57,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058814997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:57,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829524830] [2021-06-05 22:09:57,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:57,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:57,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:57,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:57,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:57,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829524830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:57,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:57,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:57,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877483092] [2021-06-05 22:09:57,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:57,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:57,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:57,675 INFO L87 Difference]: Start difference. First operand 753 states and 2566 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:58,300 INFO L93 Difference]: Finished difference Result 1356 states and 4113 transitions. [2021-06-05 22:09:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:09:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:58,302 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 22:09:58,302 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 22:09:58,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 528.9ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:09:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 22:09:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 760. [2021-06-05 22:09:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.421607378129117) internal successors, (2597), 759 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2597 transitions. [2021-06-05 22:09:58,312 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2597 transitions. Word has length 20 [2021-06-05 22:09:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:58,312 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2597 transitions. [2021-06-05 22:09:58,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2597 transitions. [2021-06-05 22:09:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:58,313 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:58,313 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:58,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6182,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:58,513 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:58,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1455411360, now seen corresponding path program 593 times [2021-06-05 22:09:58,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:58,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233489973] [2021-06-05 22:09:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:58,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233489973] [2021-06-05 22:09:58,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233489973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414887382] [2021-06-05 22:09:58,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:58,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:58,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:58,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:58,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414887382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:58,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:58,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:58,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684337784] [2021-06-05 22:09:58,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:58,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:58,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:58,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:58,793 INFO L87 Difference]: Start difference. First operand 760 states and 2597 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:59,037 INFO L93 Difference]: Finished difference Result 1136 states and 3559 transitions. [2021-06-05 22:09:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:09:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:59,039 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:09:59,039 INFO L226 Difference]: Without dead ends: 1130 [2021-06-05 22:09:59,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-06-05 22:09:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 763. [2021-06-05 22:09:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.410761154855643) internal successors, (2599), 762 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2599 transitions. [2021-06-05 22:09:59,048 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2599 transitions. Word has length 20 [2021-06-05 22:09:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:59,048 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2599 transitions. [2021-06-05 22:09:59,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2599 transitions. [2021-06-05 22:09:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:59,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:59,049 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:59,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6189,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:59,250 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:59,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1657294372, now seen corresponding path program 594 times [2021-06-05 22:09:59,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:59,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136799337] [2021-06-05 22:09:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:59,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:59,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136799337] [2021-06-05 22:09:59,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136799337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:59,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967464998] [2021-06-05 22:09:59,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:59,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:59,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:09:59,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:59,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967464998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:59,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:59,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:09:59,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355981480] [2021-06-05 22:09:59,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:09:59,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:59,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:09:59,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:09:59,559 INFO L87 Difference]: Start difference. First operand 763 states and 2599 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:59,916 INFO L93 Difference]: Finished difference Result 1139 states and 3567 transitions. [2021-06-05 22:09:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:09:59,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:09:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:59,917 INFO L225 Difference]: With dead ends: 1139 [2021-06-05 22:09:59,917 INFO L226 Difference]: Without dead ends: 1139 [2021-06-05 22:09:59,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-05 22:09:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 764. [2021-06-05 22:09:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.419397116644823) internal successors, (2609), 763 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2609 transitions. [2021-06-05 22:09:59,926 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2609 transitions. Word has length 20 [2021-06-05 22:09:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:59,926 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2609 transitions. [2021-06-05 22:09:59,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2609 transitions. [2021-06-05 22:09:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:09:59,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:59,927 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:00,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6195 [2021-06-05 22:10:00,127 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash -594247776, now seen corresponding path program 595 times [2021-06-05 22:10:00,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:00,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083823088] [2021-06-05 22:10:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:00,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:00,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083823088] [2021-06-05 22:10:00,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083823088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:00,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481869149] [2021-06-05 22:10:00,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:00,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:00,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:00,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481869149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:00,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:00,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:00,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686915947] [2021-06-05 22:10:00,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:00,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:00,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:00,394 INFO L87 Difference]: Start difference. First operand 764 states and 2609 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:00,876 INFO L93 Difference]: Finished difference Result 1206 states and 3778 transitions. [2021-06-05 22:10:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:10:00,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:00,878 INFO L225 Difference]: With dead ends: 1206 [2021-06-05 22:10:00,878 INFO L226 Difference]: Without dead ends: 1206 [2021-06-05 22:10:00,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:10:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-05 22:10:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 755. [2021-06-05 22:10:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.424403183023873) internal successors, (2582), 754 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2582 transitions. [2021-06-05 22:10:00,887 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2582 transitions. Word has length 20 [2021-06-05 22:10:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:00,887 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2582 transitions. [2021-06-05 22:10:00,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2582 transitions. [2021-06-05 22:10:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:00,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:00,888 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:01,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6203,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:01,088 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash 698094624, now seen corresponding path program 596 times [2021-06-05 22:10:01,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:01,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294750624] [2021-06-05 22:10:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:01,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:01,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294750624] [2021-06-05 22:10:01,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294750624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:01,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683659387] [2021-06-05 22:10:01,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:01,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:01,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:01,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:01,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:01,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683659387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:01,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:01,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:01,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884903083] [2021-06-05 22:10:01,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:01,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:01,380 INFO L87 Difference]: Start difference. First operand 755 states and 2582 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:01,747 INFO L93 Difference]: Finished difference Result 1235 states and 3826 transitions. [2021-06-05 22:10:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:01,749 INFO L225 Difference]: With dead ends: 1235 [2021-06-05 22:10:01,749 INFO L226 Difference]: Without dead ends: 1235 [2021-06-05 22:10:01,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-06-05 22:10:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 754. [2021-06-05 22:10:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.4209827357237717) internal successors, (2576), 753 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2576 transitions. [2021-06-05 22:10:01,759 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2576 transitions. Word has length 20 [2021-06-05 22:10:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:01,759 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2576 transitions. [2021-06-05 22:10:01,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2576 transitions. [2021-06-05 22:10:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:01,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:01,760 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:01,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6211 [2021-06-05 22:10:01,960 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:01,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1806032122, now seen corresponding path program 597 times [2021-06-05 22:10:01,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:01,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353594934] [2021-06-05 22:10:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:02,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:02,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353594934] [2021-06-05 22:10:02,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353594934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:02,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695627724] [2021-06-05 22:10:02,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:02,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:10:02,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:02,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695627724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:02,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:02,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:02,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583846484] [2021-06-05 22:10:02,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:02,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:02,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:02,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:02,238 INFO L87 Difference]: Start difference. First operand 754 states and 2576 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:02,529 INFO L93 Difference]: Finished difference Result 1137 states and 3577 transitions. [2021-06-05 22:10:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:02,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:02,531 INFO L225 Difference]: With dead ends: 1137 [2021-06-05 22:10:02,531 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 22:10:02,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 22:10:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 752. [2021-06-05 22:10:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.4207723035952062) internal successors, (2569), 751 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2569 transitions. [2021-06-05 22:10:02,540 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2569 transitions. Word has length 20 [2021-06-05 22:10:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:02,540 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2569 transitions. [2021-06-05 22:10:02,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2569 transitions. [2021-06-05 22:10:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:02,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:02,541 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:02,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6219 [2021-06-05 22:10:02,757 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1546420868, now seen corresponding path program 598 times [2021-06-05 22:10:02,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:02,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287899763] [2021-06-05 22:10:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:02,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:02,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287899763] [2021-06-05 22:10:02,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287899763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:02,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352148161] [2021-06-05 22:10:02,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:02,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:02,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:02,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:03,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352148161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:03,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:03,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984432861] [2021-06-05 22:10:03,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:03,038 INFO L87 Difference]: Start difference. First operand 752 states and 2569 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:03,396 INFO L93 Difference]: Finished difference Result 1040 states and 3330 transitions. [2021-06-05 22:10:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:03,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:03,398 INFO L225 Difference]: With dead ends: 1040 [2021-06-05 22:10:03,398 INFO L226 Difference]: Without dead ends: 1040 [2021-06-05 22:10:03,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-06-05 22:10:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 748. [2021-06-05 22:10:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.4109772423025433) internal successors, (2548), 747 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2548 transitions. [2021-06-05 22:10:03,407 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2548 transitions. Word has length 20 [2021-06-05 22:10:03,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:03,407 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2548 transitions. [2021-06-05 22:10:03,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:03,407 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2548 transitions. [2021-06-05 22:10:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:03,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:03,408 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:03,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6227,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:03,623 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:03,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:03,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1212292726, now seen corresponding path program 599 times [2021-06-05 22:10:03,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:03,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573347371] [2021-06-05 22:10:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:03,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:03,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573347371] [2021-06-05 22:10:03,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573347371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:03,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517624789] [2021-06-05 22:10:03,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:03,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:03,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:03,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:03,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:03,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517624789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:03,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:03,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:03,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522481906] [2021-06-05 22:10:03,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:03,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:03,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:03,890 INFO L87 Difference]: Start difference. First operand 748 states and 2548 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:04,170 INFO L93 Difference]: Finished difference Result 1107 states and 3484 transitions. [2021-06-05 22:10:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:04,171 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 22:10:04,171 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 22:10:04,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 22:10:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 768. [2021-06-05 22:10:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.4106910039113427) internal successors, (2616), 767 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2616 transitions. [2021-06-05 22:10:04,181 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2616 transitions. Word has length 20 [2021-06-05 22:10:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:04,181 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2616 transitions. [2021-06-05 22:10:04,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2616 transitions. [2021-06-05 22:10:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:04,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:04,182 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:04,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6235 [2021-06-05 22:10:04,382 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:04,382 INFO L82 PathProgramCache]: Analyzing trace with hash 282119512, now seen corresponding path program 600 times [2021-06-05 22:10:04,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:04,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134315838] [2021-06-05 22:10:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:04,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:04,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134315838] [2021-06-05 22:10:04,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134315838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:04,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626489452] [2021-06-05 22:10:04,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:04,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:04,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:04,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626489452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:04,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:04,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:04,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514182968] [2021-06-05 22:10:04,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:04,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:04,692 INFO L87 Difference]: Start difference. First operand 768 states and 2616 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:05,137 INFO L93 Difference]: Finished difference Result 1136 states and 3544 transitions. [2021-06-05 22:10:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:05,138 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 22:10:05,138 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 22:10:05,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 22:10:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 768. [2021-06-05 22:10:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.4106910039113427) internal successors, (2616), 767 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2616 transitions. [2021-06-05 22:10:05,148 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2616 transitions. Word has length 20 [2021-06-05 22:10:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:05,148 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2616 transitions. [2021-06-05 22:10:05,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2616 transitions. [2021-06-05 22:10:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:05,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:05,149 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:05,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6242,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:05,349 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:05,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1211788210, now seen corresponding path program 601 times [2021-06-05 22:10:05,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:05,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131880851] [2021-06-05 22:10:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:05,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:05,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131880851] [2021-06-05 22:10:05,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131880851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:05,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957745092] [2021-06-05 22:10:05,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:05,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957745092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:05,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:05,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:05,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083365302] [2021-06-05 22:10:05,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:05,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:05,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:05,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:05,700 INFO L87 Difference]: Start difference. First operand 768 states and 2616 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:05,971 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-06-05 22:10:06,100 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-06-05 22:10:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:06,224 INFO L93 Difference]: Finished difference Result 1075 states and 3390 transitions. [2021-06-05 22:10:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:10:06,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:06,225 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 22:10:06,225 INFO L226 Difference]: Without dead ends: 1069 [2021-06-05 22:10:06,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:10:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-05 22:10:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 768. [2021-06-05 22:10:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.406779661016949) internal successors, (2613), 767 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2613 transitions. [2021-06-05 22:10:06,234 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2613 transitions. Word has length 20 [2021-06-05 22:10:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:06,234 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2613 transitions. [2021-06-05 22:10:06,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2613 transitions. [2021-06-05 22:10:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:06,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:06,235 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:06,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6249,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:06,435 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1642236252, now seen corresponding path program 602 times [2021-06-05 22:10:06,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:06,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128757132] [2021-06-05 22:10:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:06,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:06,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128757132] [2021-06-05 22:10:06,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128757132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:06,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100850383] [2021-06-05 22:10:06,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:06,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:06,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100850383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:06,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:06,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:06,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627878579] [2021-06-05 22:10:06,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:06,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:06,737 INFO L87 Difference]: Start difference. First operand 768 states and 2613 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:07,006 INFO L93 Difference]: Finished difference Result 1050 states and 3349 transitions. [2021-06-05 22:10:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:07,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:07,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:07,008 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 22:10:07,008 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 22:10:07,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 22:10:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 765. [2021-06-05 22:10:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.4096858638743455) internal successors, (2605), 764 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2605 transitions. [2021-06-05 22:10:07,017 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2605 transitions. Word has length 20 [2021-06-05 22:10:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:07,017 INFO L482 AbstractCegarLoop]: Abstraction has 765 states and 2605 transitions. [2021-06-05 22:10:07,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2605 transitions. [2021-06-05 22:10:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:07,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:07,018 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:07,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6258,631 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:07,218 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -673932632, now seen corresponding path program 603 times [2021-06-05 22:10:07,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:07,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720449146] [2021-06-05 22:10:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:07,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720449146] [2021-06-05 22:10:07,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720449146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563590563] [2021-06-05 22:10:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:07,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:07,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:07,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:07,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563590563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:07,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:07,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887529179] [2021-06-05 22:10:07,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:07,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:07,584 INFO L87 Difference]: Start difference. First operand 765 states and 2605 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:08,112 INFO L93 Difference]: Finished difference Result 974 states and 3152 transitions. [2021-06-05 22:10:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:08,113 INFO L225 Difference]: With dead ends: 974 [2021-06-05 22:10:08,114 INFO L226 Difference]: Without dead ends: 962 [2021-06-05 22:10:08,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-06-05 22:10:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 765. [2021-06-05 22:10:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.405759162303665) internal successors, (2602), 764 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2602 transitions. [2021-06-05 22:10:08,122 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2602 transitions. Word has length 20 [2021-06-05 22:10:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:08,122 INFO L482 AbstractCegarLoop]: Abstraction has 765 states and 2602 transitions. [2021-06-05 22:10:08,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2602 transitions. [2021-06-05 22:10:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:08,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:08,123 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:08,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6266 [2021-06-05 22:10:08,324 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:08,324 INFO L82 PathProgramCache]: Analyzing trace with hash -503934508, now seen corresponding path program 604 times [2021-06-05 22:10:08,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:08,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589366088] [2021-06-05 22:10:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:08,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:08,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589366088] [2021-06-05 22:10:08,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589366088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:08,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842584795] [2021-06-05 22:10:08,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:08,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:08,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:08,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842584795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:08,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:08,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:10:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208364500] [2021-06-05 22:10:08,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:10:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:10:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:10:08,598 INFO L87 Difference]: Start difference. First operand 765 states and 2602 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:08,846 INFO L93 Difference]: Finished difference Result 1006 states and 3247 transitions. [2021-06-05 22:10:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:08,848 INFO L225 Difference]: With dead ends: 1006 [2021-06-05 22:10:08,848 INFO L226 Difference]: Without dead ends: 1006 [2021-06-05 22:10:08,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-06-05 22:10:08,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 762. [2021-06-05 22:10:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4086727989487517) internal successors, (2594), 761 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2594 transitions. [2021-06-05 22:10:08,856 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2594 transitions. Word has length 20 [2021-06-05 22:10:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:08,857 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2594 transitions. [2021-06-05 22:10:08,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2594 transitions. [2021-06-05 22:10:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:08,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:08,857 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:09,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6277 [2021-06-05 22:10:09,058 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2100696610, now seen corresponding path program 605 times [2021-06-05 22:10:09,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:09,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3946791] [2021-06-05 22:10:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:09,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:09,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3946791] [2021-06-05 22:10:09,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3946791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:09,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045485147] [2021-06-05 22:10:09,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:09,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:09,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:09,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:09,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045485147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:09,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:09,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:09,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498762138] [2021-06-05 22:10:09,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:09,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:09,366 INFO L87 Difference]: Start difference. First operand 762 states and 2594 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:09,816 INFO L93 Difference]: Finished difference Result 1360 states and 4071 transitions. [2021-06-05 22:10:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:10:09,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:09,818 INFO L225 Difference]: With dead ends: 1360 [2021-06-05 22:10:09,818 INFO L226 Difference]: Without dead ends: 1360 [2021-06-05 22:10:09,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-06-05 22:10:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 766. [2021-06-05 22:10:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.4169934640522874) internal successors, (2614), 765 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2614 transitions. [2021-06-05 22:10:09,828 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2614 transitions. Word has length 20 [2021-06-05 22:10:09,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:09,828 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2614 transitions. [2021-06-05 22:10:09,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2614 transitions. [2021-06-05 22:10:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:09,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:09,829 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:10,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6281,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:10,030 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash -267201866, now seen corresponding path program 606 times [2021-06-05 22:10:10,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:10,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419370918] [2021-06-05 22:10:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:10,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:10,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419370918] [2021-06-05 22:10:10,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419370918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:10,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684617997] [2021-06-05 22:10:10,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:10,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:10,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684617997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:10,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:10,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:10,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299078733] [2021-06-05 22:10:10,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:10,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:10,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:10,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:10,349 INFO L87 Difference]: Start difference. First operand 766 states and 2614 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:10,819 INFO L93 Difference]: Finished difference Result 1265 states and 3836 transitions. [2021-06-05 22:10:10,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:10:10,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:10,821 INFO L225 Difference]: With dead ends: 1265 [2021-06-05 22:10:10,821 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 22:10:10,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 22:10:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 767. [2021-06-05 22:10:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.4281984334203655) internal successors, (2626), 766 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2626 transitions. [2021-06-05 22:10:10,831 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2626 transitions. Word has length 20 [2021-06-05 22:10:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:10,831 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2626 transitions. [2021-06-05 22:10:10,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2626 transitions. [2021-06-05 22:10:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:10,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:10,832 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:11,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6292,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:11,033 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash -578852372, now seen corresponding path program 607 times [2021-06-05 22:10:11,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:11,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230471201] [2021-06-05 22:10:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:11,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:11,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230471201] [2021-06-05 22:10:11,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230471201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:11,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289685950] [2021-06-05 22:10:11,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:11,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:11,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:11,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289685950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:11,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:11,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:11,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287611246] [2021-06-05 22:10:11,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:11,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:11,323 INFO L87 Difference]: Start difference. First operand 767 states and 2626 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:11,581 INFO L93 Difference]: Finished difference Result 1125 states and 3534 transitions. [2021-06-05 22:10:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:11,583 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 22:10:11,583 INFO L226 Difference]: Without dead ends: 1118 [2021-06-05 22:10:11,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-06-05 22:10:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 771. [2021-06-05 22:10:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.4285714285714284) internal successors, (2640), 770 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2640 transitions. [2021-06-05 22:10:11,592 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2640 transitions. Word has length 20 [2021-06-05 22:10:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:11,592 INFO L482 AbstractCegarLoop]: Abstraction has 771 states and 2640 transitions. [2021-06-05 22:10:11,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2640 transitions. [2021-06-05 22:10:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:11,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:11,593 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:11,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6301 [2021-06-05 22:10:11,793 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1789050452, now seen corresponding path program 608 times [2021-06-05 22:10:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:11,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178007239] [2021-06-05 22:10:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:11,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:11,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178007239] [2021-06-05 22:10:11,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178007239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:11,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092249264] [2021-06-05 22:10:11,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:11,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:11,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:12,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092249264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:12,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:12,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:12,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064211117] [2021-06-05 22:10:12,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:12,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:12,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:12,058 INFO L87 Difference]: Start difference. First operand 771 states and 2640 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:12,287 INFO L93 Difference]: Finished difference Result 1138 states and 3581 transitions. [2021-06-05 22:10:12,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:12,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:12,289 INFO L225 Difference]: With dead ends: 1138 [2021-06-05 22:10:12,289 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 22:10:12,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 22:10:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 769. [2021-06-05 22:10:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.4309895833333335) internal successors, (2635), 768 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2635 transitions. [2021-06-05 22:10:12,298 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2635 transitions. Word has length 20 [2021-06-05 22:10:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:12,298 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2635 transitions. [2021-06-05 22:10:12,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2635 transitions. [2021-06-05 22:10:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:12,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:12,299 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:12,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6308,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:12,500 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1442870248, now seen corresponding path program 609 times [2021-06-05 22:10:12,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:12,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639842432] [2021-06-05 22:10:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:12,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:12,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639842432] [2021-06-05 22:10:12,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639842432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:12,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58836056] [2021-06-05 22:10:12,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:12,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:10:12,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:12,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:12,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:12,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58836056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:12,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:12,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:12,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543637832] [2021-06-05 22:10:12,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:12,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:12,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:12,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:12,867 INFO L87 Difference]: Start difference. First operand 769 states and 2635 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:13,251 INFO L93 Difference]: Finished difference Result 1196 states and 3711 transitions. [2021-06-05 22:10:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:13,252 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:13,253 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 22:10:13,253 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 22:10:13,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 416.3ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 22:10:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 766. [2021-06-05 22:10:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.426143790849673) internal successors, (2621), 765 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2621 transitions. [2021-06-05 22:10:13,263 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2621 transitions. Word has length 20 [2021-06-05 22:10:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:13,263 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2621 transitions. [2021-06-05 22:10:13,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2621 transitions. [2021-06-05 22:10:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:13,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:13,264 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:13,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6316,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:13,464 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:13,464 INFO L82 PathProgramCache]: Analyzing trace with hash -150527848, now seen corresponding path program 610 times [2021-06-05 22:10:13,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:13,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442360393] [2021-06-05 22:10:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:13,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:13,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442360393] [2021-06-05 22:10:13,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442360393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:13,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330838290] [2021-06-05 22:10:13,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:13,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:13,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:13,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:13,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330838290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:13,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:13,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:13,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527656067] [2021-06-05 22:10:13,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:13,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:13,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:13,795 INFO L87 Difference]: Start difference. First operand 766 states and 2621 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:14,167 INFO L93 Difference]: Finished difference Result 1159 states and 3629 transitions. [2021-06-05 22:10:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:14,169 INFO L225 Difference]: With dead ends: 1159 [2021-06-05 22:10:14,169 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 22:10:14,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 22:10:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 765. [2021-06-05 22:10:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.4227748691099475) internal successors, (2615), 764 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2615 transitions. [2021-06-05 22:10:14,178 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2615 transitions. Word has length 20 [2021-06-05 22:10:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:14,178 INFO L482 AbstractCegarLoop]: Abstraction has 765 states and 2615 transitions. [2021-06-05 22:10:14,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2615 transitions. [2021-06-05 22:10:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:14,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:14,179 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:14,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6328,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:14,379 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:14,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:14,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1422133720, now seen corresponding path program 611 times [2021-06-05 22:10:14,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:14,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805080694] [2021-06-05 22:10:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:14,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:14,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805080694] [2021-06-05 22:10:14,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805080694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:14,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234661939] [2021-06-05 22:10:14,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:14,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:14,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:14,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:14,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234661939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:14,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:14,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:14,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171514445] [2021-06-05 22:10:14,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:14,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:14,670 INFO L87 Difference]: Start difference. First operand 765 states and 2615 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:15,079 INFO L93 Difference]: Finished difference Result 1080 states and 3421 transitions. [2021-06-05 22:10:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:10:15,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:15,081 INFO L225 Difference]: With dead ends: 1080 [2021-06-05 22:10:15,081 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 22:10:15,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:10:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 22:10:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 775. [2021-06-05 22:10:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.41343669250646) internal successors, (2642), 774 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2642 transitions. [2021-06-05 22:10:15,090 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2642 transitions. Word has length 20 [2021-06-05 22:10:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:15,090 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2642 transitions. [2021-06-05 22:10:15,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2642 transitions. [2021-06-05 22:10:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:15,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:15,091 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:15,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6336,640 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:15,292 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:15,292 INFO L82 PathProgramCache]: Analyzing trace with hash 957409650, now seen corresponding path program 612 times [2021-06-05 22:10:15,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:15,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746434521] [2021-06-05 22:10:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:15,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:15,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746434521] [2021-06-05 22:10:15,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746434521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:15,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354735290] [2021-06-05 22:10:15,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:15,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:15,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:15,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:15,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354735290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:15,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:15,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:15,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339924665] [2021-06-05 22:10:15,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:15,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:15,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:15,634 INFO L87 Difference]: Start difference. First operand 775 states and 2642 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:16,010 INFO L93 Difference]: Finished difference Result 1180 states and 3681 transitions. [2021-06-05 22:10:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:16,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:16,012 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 22:10:16,012 INFO L226 Difference]: Without dead ends: 1180 [2021-06-05 22:10:16,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:10:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-06-05 22:10:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 765. [2021-06-05 22:10:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.4227748691099475) internal successors, (2615), 764 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2615 transitions. [2021-06-05 22:10:16,021 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2615 transitions. Word has length 20 [2021-06-05 22:10:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:16,021 INFO L482 AbstractCegarLoop]: Abstraction has 765 states and 2615 transitions. [2021-06-05 22:10:16,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:16,021 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2615 transitions. [2021-06-05 22:10:16,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:16,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:16,022 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:16,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6344 [2021-06-05 22:10:16,223 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash -926539372, now seen corresponding path program 613 times [2021-06-05 22:10:16,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:16,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216157634] [2021-06-05 22:10:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:16,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216157634] [2021-06-05 22:10:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216157634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649246859] [2021-06-05 22:10:16,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:16,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:16,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649246859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:16,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:16,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:16,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093064591] [2021-06-05 22:10:16,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:16,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:16,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:16,513 INFO L87 Difference]: Start difference. First operand 765 states and 2615 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:16,814 INFO L93 Difference]: Finished difference Result 1190 states and 3700 transitions. [2021-06-05 22:10:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:16,815 INFO L225 Difference]: With dead ends: 1190 [2021-06-05 22:10:16,816 INFO L226 Difference]: Without dead ends: 1190 [2021-06-05 22:10:16,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-06-05 22:10:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 768. [2021-06-05 22:10:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.4289439374185138) internal successors, (2630), 767 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2630 transitions. [2021-06-05 22:10:16,825 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2630 transitions. Word has length 20 [2021-06-05 22:10:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:16,825 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2630 transitions. [2021-06-05 22:10:16,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2630 transitions. [2021-06-05 22:10:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:16,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:16,826 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:17,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6352,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:17,027 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash 697798396, now seen corresponding path program 614 times [2021-06-05 22:10:17,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:17,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236398728] [2021-06-05 22:10:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:17,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236398728] [2021-06-05 22:10:17,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236398728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148168172] [2021-06-05 22:10:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:17,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:17,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:17,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148168172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:17,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:17,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:17,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98682415] [2021-06-05 22:10:17,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:17,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:17,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:17,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:17,342 INFO L87 Difference]: Start difference. First operand 768 states and 2630 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:17,650 INFO L93 Difference]: Finished difference Result 1154 states and 3620 transitions. [2021-06-05 22:10:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:17,652 INFO L225 Difference]: With dead ends: 1154 [2021-06-05 22:10:17,652 INFO L226 Difference]: Without dead ends: 1154 [2021-06-05 22:10:17,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-05 22:10:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 764. [2021-06-05 22:10:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.419397116644823) internal successors, (2609), 763 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2609 transitions. [2021-06-05 22:10:17,661 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2609 transitions. Word has length 20 [2021-06-05 22:10:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:17,661 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2609 transitions. [2021-06-05 22:10:17,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2609 transitions. [2021-06-05 22:10:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:17,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:17,662 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:17,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6360 [2021-06-05 22:10:17,863 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 853975960, now seen corresponding path program 615 times [2021-06-05 22:10:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:17,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379414417] [2021-06-05 22:10:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:17,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:17,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379414417] [2021-06-05 22:10:17,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379414417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:17,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775256392] [2021-06-05 22:10:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:18,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:18,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775256392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:18,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:18,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:18,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185867266] [2021-06-05 22:10:18,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:18,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:18,236 INFO L87 Difference]: Start difference. First operand 764 states and 2609 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:18,884 INFO L93 Difference]: Finished difference Result 967 states and 3143 transitions. [2021-06-05 22:10:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:18,886 INFO L225 Difference]: With dead ends: 967 [2021-06-05 22:10:18,886 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 22:10:18,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:10:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 22:10:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 766. [2021-06-05 22:10:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.4196078431372547) internal successors, (2616), 765 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2616 transitions. [2021-06-05 22:10:18,894 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2616 transitions. Word has length 20 [2021-06-05 22:10:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:18,894 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2616 transitions. [2021-06-05 22:10:18,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2616 transitions. [2021-06-05 22:10:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:18,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:18,895 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:19,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6368,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:19,113 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1605376398, now seen corresponding path program 616 times [2021-06-05 22:10:19,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:19,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894206923] [2021-06-05 22:10:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:19,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:19,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894206923] [2021-06-05 22:10:19,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894206923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:19,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624355773] [2021-06-05 22:10:19,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:19,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:19,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624355773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:19,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:19,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:19,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015891808] [2021-06-05 22:10:19,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:19,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:19,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:19,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:19,419 INFO L87 Difference]: Start difference. First operand 766 states and 2616 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:19,919 INFO L93 Difference]: Finished difference Result 1006 states and 3230 transitions. [2021-06-05 22:10:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:10:19,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:19,921 INFO L225 Difference]: With dead ends: 1006 [2021-06-05 22:10:19,921 INFO L226 Difference]: Without dead ends: 1000 [2021-06-05 22:10:19,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:10:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-05 22:10:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 776. [2021-06-05 22:10:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.410322580645161) internal successors, (2643), 775 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2643 transitions. [2021-06-05 22:10:19,930 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2643 transitions. Word has length 20 [2021-06-05 22:10:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:19,930 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2643 transitions. [2021-06-05 22:10:19,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2643 transitions. [2021-06-05 22:10:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:19,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:19,931 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:20,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6376 [2021-06-05 22:10:20,131 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash -310047528, now seen corresponding path program 617 times [2021-06-05 22:10:20,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:20,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662846841] [2021-06-05 22:10:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:20,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:20,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662846841] [2021-06-05 22:10:20,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662846841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:20,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979190768] [2021-06-05 22:10:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:20,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:20,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:20,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:20,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979190768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:20,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:20,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:20,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442962611] [2021-06-05 22:10:20,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:20,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:20,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:20,447 INFO L87 Difference]: Start difference. First operand 776 states and 2643 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:20,922 INFO L93 Difference]: Finished difference Result 1106 states and 3490 transitions. [2021-06-05 22:10:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:10:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:20,923 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 22:10:20,923 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 22:10:20,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:10:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 22:10:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 764. [2021-06-05 22:10:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.419397116644823) internal successors, (2609), 763 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2609 transitions. [2021-06-05 22:10:20,932 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2609 transitions. Word has length 20 [2021-06-05 22:10:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:20,932 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2609 transitions. [2021-06-05 22:10:20,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2609 transitions. [2021-06-05 22:10:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:20,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:20,933 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:21,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6384 [2021-06-05 22:10:21,133 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:21,134 INFO L82 PathProgramCache]: Analyzing trace with hash 927084582, now seen corresponding path program 618 times [2021-06-05 22:10:21,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:21,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896519765] [2021-06-05 22:10:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:21,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:21,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896519765] [2021-06-05 22:10:21,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896519765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:21,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010938194] [2021-06-05 22:10:21,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:21,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:21,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010938194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:21,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:21,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:10:21,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199919463] [2021-06-05 22:10:21,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:10:21,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:21,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:10:21,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:10:21,396 INFO L87 Difference]: Start difference. First operand 764 states and 2609 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:21,680 INFO L93 Difference]: Finished difference Result 1016 states and 3275 transitions. [2021-06-05 22:10:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:21,681 INFO L225 Difference]: With dead ends: 1016 [2021-06-05 22:10:21,681 INFO L226 Difference]: Without dead ends: 1016 [2021-06-05 22:10:21,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-05 22:10:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 760. [2021-06-05 22:10:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.4163372859025034) internal successors, (2593), 759 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2593 transitions. [2021-06-05 22:10:21,690 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2593 transitions. Word has length 20 [2021-06-05 22:10:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:21,690 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2593 transitions. [2021-06-05 22:10:21,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2593 transitions. [2021-06-05 22:10:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:21,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:21,691 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:21,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6393,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:21,891 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:21,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1678485020, now seen corresponding path program 619 times [2021-06-05 22:10:21,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:21,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402275379] [2021-06-05 22:10:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:21,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:21,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402275379] [2021-06-05 22:10:21,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402275379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:21,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080919757] [2021-06-05 22:10:21,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:22,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:22,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:22,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080919757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:22,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:22,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:22,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671983321] [2021-06-05 22:10:22,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:22,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:22,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:22,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:22,223 INFO L87 Difference]: Start difference. First operand 760 states and 2593 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:22,532 INFO L93 Difference]: Finished difference Result 1036 states and 3314 transitions. [2021-06-05 22:10:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:22,534 INFO L225 Difference]: With dead ends: 1036 [2021-06-05 22:10:22,534 INFO L226 Difference]: Without dead ends: 1036 [2021-06-05 22:10:22,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-06-05 22:10:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 759. [2021-06-05 22:10:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.4142480211081794) internal successors, (2588), 758 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2588 transitions. [2021-06-05 22:10:22,543 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2588 transitions. Word has length 20 [2021-06-05 22:10:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:22,543 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2588 transitions. [2021-06-05 22:10:22,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2588 transitions. [2021-06-05 22:10:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:22,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:22,544 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:22,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6398 [2021-06-05 22:10:22,744 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash -992144508, now seen corresponding path program 620 times [2021-06-05 22:10:22,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:22,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478098906] [2021-06-05 22:10:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:22,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:22,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478098906] [2021-06-05 22:10:22,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478098906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:22,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106773629] [2021-06-05 22:10:22,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:22,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:22,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:22,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:23,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106773629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:23,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:23,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:23,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371816829] [2021-06-05 22:10:23,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:23,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:23,059 INFO L87 Difference]: Start difference. First operand 759 states and 2588 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:23,376 INFO L93 Difference]: Finished difference Result 994 states and 3219 transitions. [2021-06-05 22:10:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:23,378 INFO L225 Difference]: With dead ends: 994 [2021-06-05 22:10:23,378 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 22:10:23,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 22:10:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 743. [2021-06-05 22:10:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.407008086253369) internal successors, (2528), 742 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2528 transitions. [2021-06-05 22:10:23,386 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2528 transitions. Word has length 20 [2021-06-05 22:10:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:23,386 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2528 transitions. [2021-06-05 22:10:23,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2528 transitions. [2021-06-05 22:10:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:23,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:23,387 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:23,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6405,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:23,587 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash 921563368, now seen corresponding path program 621 times [2021-06-05 22:10:23,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:23,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421550122] [2021-06-05 22:10:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:23,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:23,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421550122] [2021-06-05 22:10:23,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421550122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:23,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922759858] [2021-06-05 22:10:23,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:23,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:23,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:23,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:23,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922759858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:23,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:23,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:23,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387197744] [2021-06-05 22:10:23,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:23,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:23,893 INFO L87 Difference]: Start difference. First operand 743 states and 2528 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:24,327 INFO L93 Difference]: Finished difference Result 1076 states and 3402 transitions. [2021-06-05 22:10:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:24,329 INFO L225 Difference]: With dead ends: 1076 [2021-06-05 22:10:24,329 INFO L226 Difference]: Without dead ends: 1062 [2021-06-05 22:10:24,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-06-05 22:10:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 740. [2021-06-05 22:10:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.4059539918809203) internal successors, (2517), 739 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2517 transitions. [2021-06-05 22:10:24,338 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2517 transitions. Word has length 20 [2021-06-05 22:10:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:24,338 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2517 transitions. [2021-06-05 22:10:24,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2517 transitions. [2021-06-05 22:10:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:24,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:24,339 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:24,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6412,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:24,539 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash 3702490, now seen corresponding path program 622 times [2021-06-05 22:10:24,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:24,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604205272] [2021-06-05 22:10:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:24,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:24,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604205272] [2021-06-05 22:10:24,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604205272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:24,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375139032] [2021-06-05 22:10:24,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:24,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:24,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:24,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:24,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375139032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:24,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:24,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:24,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559591097] [2021-06-05 22:10:24,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:24,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:24,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:24,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:24,808 INFO L87 Difference]: Start difference. First operand 740 states and 2517 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:25,103 INFO L93 Difference]: Finished difference Result 1161 states and 3674 transitions. [2021-06-05 22:10:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:25,105 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 22:10:25,105 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 22:10:25,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 22:10:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 748. [2021-06-05 22:10:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.4096385542168677) internal successors, (2547), 747 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2547 transitions. [2021-06-05 22:10:25,114 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2547 transitions. Word has length 20 [2021-06-05 22:10:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:25,114 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2547 transitions. [2021-06-05 22:10:25,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2547 transitions. [2021-06-05 22:10:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:25,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:25,115 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:25,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6419,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:25,316 INFO L430 AbstractCegarLoop]: === Iteration 790 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:25,316 INFO L82 PathProgramCache]: Analyzing trace with hash 712060708, now seen corresponding path program 623 times [2021-06-05 22:10:25,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:25,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116637439] [2021-06-05 22:10:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:25,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116637439] [2021-06-05 22:10:25,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116637439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:25,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345334463] [2021-06-05 22:10:25,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:25,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:25,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:25,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:25,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345334463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:25,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:25,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:25,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924380473] [2021-06-05 22:10:25,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:25,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:25,594 INFO L87 Difference]: Start difference. First operand 748 states and 2547 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:26,167 INFO L93 Difference]: Finished difference Result 1445 states and 4360 transitions. [2021-06-05 22:10:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:10:26,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:26,169 INFO L225 Difference]: With dead ends: 1445 [2021-06-05 22:10:26,169 INFO L226 Difference]: Without dead ends: 1445 [2021-06-05 22:10:26,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:10:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-06-05 22:10:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 754. [2021-06-05 22:10:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.4156706507304118) internal successors, (2572), 753 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2572 transitions. [2021-06-05 22:10:26,179 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2572 transitions. Word has length 20 [2021-06-05 22:10:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:26,179 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2572 transitions. [2021-06-05 22:10:26,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2572 transitions. [2021-06-05 22:10:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:26,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:26,180 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:26,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6424,652 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:26,381 INFO L430 AbstractCegarLoop]: === Iteration 791 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -781847014, now seen corresponding path program 624 times [2021-06-05 22:10:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:26,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700753437] [2021-06-05 22:10:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:26,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:26,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700753437] [2021-06-05 22:10:26,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700753437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:26,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44311785] [2021-06-05 22:10:26,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:26,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:26,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:26,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44311785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:26,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:26,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740907945] [2021-06-05 22:10:26,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:26,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:26,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:26,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:26,652 INFO L87 Difference]: Start difference. First operand 754 states and 2572 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:26,908 INFO L93 Difference]: Finished difference Result 1179 states and 3710 transitions. [2021-06-05 22:10:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:26,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:26,910 INFO L225 Difference]: With dead ends: 1179 [2021-06-05 22:10:26,910 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 22:10:26,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 22:10:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 754. [2021-06-05 22:10:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.407702523240372) internal successors, (2566), 753 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2566 transitions. [2021-06-05 22:10:26,920 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2566 transitions. Word has length 20 [2021-06-05 22:10:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:26,920 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2566 transitions. [2021-06-05 22:10:26,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2566 transitions. [2021-06-05 22:10:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:26,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:26,921 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:27,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6431,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:27,121 INFO L430 AbstractCegarLoop]: === Iteration 792 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1457937328, now seen corresponding path program 625 times [2021-06-05 22:10:27,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:27,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519418980] [2021-06-05 22:10:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:27,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:27,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519418980] [2021-06-05 22:10:27,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519418980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:27,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315285379] [2021-06-05 22:10:27,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:27,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:27,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315285379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:27,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:27,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:27,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591823695] [2021-06-05 22:10:27,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:27,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:27,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:27,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:27,422 INFO L87 Difference]: Start difference. First operand 754 states and 2566 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:27,916 INFO L93 Difference]: Finished difference Result 1096 states and 3465 transitions. [2021-06-05 22:10:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:27,918 INFO L225 Difference]: With dead ends: 1096 [2021-06-05 22:10:27,918 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 22:10:27,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 22:10:27,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 756. [2021-06-05 22:10:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.40794701986755) internal successors, (2573), 755 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2573 transitions. [2021-06-05 22:10:27,927 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2573 transitions. Word has length 20 [2021-06-05 22:10:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:27,927 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2573 transitions. [2021-06-05 22:10:27,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2573 transitions. [2021-06-05 22:10:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:27,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:27,928 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:28,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6437,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:28,128 INFO L430 AbstractCegarLoop]: === Iteration 793 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1067393816, now seen corresponding path program 626 times [2021-06-05 22:10:28,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:28,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775912374] [2021-06-05 22:10:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:28,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:28,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775912374] [2021-06-05 22:10:28,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775912374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:28,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662463642] [2021-06-05 22:10:28,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:28,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:28,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:28,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662463642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:28,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:28,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:28,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318478007] [2021-06-05 22:10:28,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:28,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:28,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:28,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:28,421 INFO L87 Difference]: Start difference. First operand 756 states and 2573 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:28,981 INFO L93 Difference]: Finished difference Result 1135 states and 3552 transitions. [2021-06-05 22:10:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:10:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:28,982 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 22:10:28,982 INFO L226 Difference]: Without dead ends: 1128 [2021-06-05 22:10:28,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:10:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-06-05 22:10:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 767. [2021-06-05 22:10:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.3968668407310707) internal successors, (2602), 766 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2602 transitions. [2021-06-05 22:10:28,991 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2602 transitions. Word has length 20 [2021-06-05 22:10:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:28,991 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2602 transitions. [2021-06-05 22:10:28,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2602 transitions. [2021-06-05 22:10:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:28,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:29,000 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:29,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6449,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:29,205 INFO L430 AbstractCegarLoop]: === Iteration 794 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1834239964, now seen corresponding path program 627 times [2021-06-05 22:10:29,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:29,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463227286] [2021-06-05 22:10:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:29,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:29,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463227286] [2021-06-05 22:10:29,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463227286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:29,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501190070] [2021-06-05 22:10:29,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:29,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:29,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:29,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:29,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501190070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:29,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:29,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:29,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956613514] [2021-06-05 22:10:29,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:29,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:29,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:29,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:29,524 INFO L87 Difference]: Start difference. First operand 767 states and 2602 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:29,991 INFO L93 Difference]: Finished difference Result 1167 states and 3644 transitions. [2021-06-05 22:10:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:29,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:29,992 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 22:10:29,992 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 22:10:29,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 22:10:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 754. [2021-06-05 22:10:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.407702523240372) internal successors, (2566), 753 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2566 transitions. [2021-06-05 22:10:30,001 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2566 transitions. Word has length 20 [2021-06-05 22:10:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:30,002 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2566 transitions. [2021-06-05 22:10:30,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2566 transitions. [2021-06-05 22:10:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:30,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:30,002 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:30,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6457,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:30,203 INFO L430 AbstractCegarLoop]: === Iteration 795 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1822279588, now seen corresponding path program 628 times [2021-06-05 22:10:30,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:30,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745177623] [2021-06-05 22:10:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:30,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745177623] [2021-06-05 22:10:30,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745177623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427471213] [2021-06-05 22:10:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:30,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:30,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427471213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:30,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:30,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:30,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408865409] [2021-06-05 22:10:30,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:30,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:30,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:30,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:30,477 INFO L87 Difference]: Start difference. First operand 754 states and 2566 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:30,795 INFO L93 Difference]: Finished difference Result 1317 states and 4073 transitions. [2021-06-05 22:10:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:30,797 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 22:10:30,797 INFO L226 Difference]: Without dead ends: 1317 [2021-06-05 22:10:30,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-05 22:10:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 757. [2021-06-05 22:10:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.414021164021164) internal successors, (2581), 756 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2581 transitions. [2021-06-05 22:10:30,807 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2581 transitions. Word has length 20 [2021-06-05 22:10:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:30,807 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2581 transitions. [2021-06-05 22:10:30,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2581 transitions. [2021-06-05 22:10:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:30,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:30,808 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:31,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6470 [2021-06-05 22:10:31,008 INFO L430 AbstractCegarLoop]: === Iteration 796 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1289921628, now seen corresponding path program 629 times [2021-06-05 22:10:31,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:31,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154271896] [2021-06-05 22:10:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:31,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:31,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154271896] [2021-06-05 22:10:31,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154271896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:31,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526776660] [2021-06-05 22:10:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:31,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:31,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:31,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:31,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:31,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526776660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:31,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:31,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:31,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241511173] [2021-06-05 22:10:31,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:31,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:31,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:31,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:31,283 INFO L87 Difference]: Start difference. First operand 757 states and 2581 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:31,720 INFO L93 Difference]: Finished difference Result 1329 states and 4102 transitions. [2021-06-05 22:10:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:10:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:31,722 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 22:10:31,722 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 22:10:31,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:10:31,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 22:10:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 758. [2021-06-05 22:10:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.417437252311757) internal successors, (2587), 757 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2587 transitions. [2021-06-05 22:10:31,732 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2587 transitions. Word has length 20 [2021-06-05 22:10:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:31,732 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2587 transitions. [2021-06-05 22:10:31,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2587 transitions. [2021-06-05 22:10:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:31,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:31,733 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:31,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6475 [2021-06-05 22:10:31,934 INFO L430 AbstractCegarLoop]: === Iteration 797 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:31,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1047908712, now seen corresponding path program 630 times [2021-06-05 22:10:31,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:31,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451014186] [2021-06-05 22:10:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:31,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:31,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451014186] [2021-06-05 22:10:31,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451014186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:31,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379727930] [2021-06-05 22:10:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:32,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:32,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:32,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379727930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:32,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:32,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:32,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348285097] [2021-06-05 22:10:32,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:32,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:32,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:32,209 INFO L87 Difference]: Start difference. First operand 758 states and 2587 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:32,516 INFO L93 Difference]: Finished difference Result 1296 states and 4025 transitions. [2021-06-05 22:10:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:32,518 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 22:10:32,518 INFO L226 Difference]: Without dead ends: 1296 [2021-06-05 22:10:32,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-05 22:10:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 754. [2021-06-05 22:10:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.407702523240372) internal successors, (2566), 753 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2566 transitions. [2021-06-05 22:10:32,528 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2566 transitions. Word has length 20 [2021-06-05 22:10:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:32,528 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2566 transitions. [2021-06-05 22:10:32,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2566 transitions. [2021-06-05 22:10:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:32,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:32,529 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:32,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6482 [2021-06-05 22:10:32,729 INFO L430 AbstractCegarLoop]: === Iteration 798 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:32,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2143079798, now seen corresponding path program 631 times [2021-06-05 22:10:32,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:32,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161649215] [2021-06-05 22:10:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:32,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:32,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161649215] [2021-06-05 22:10:32,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161649215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:32,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626528561] [2021-06-05 22:10:32,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:33,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626528561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:33,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:33,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:33,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949007488] [2021-06-05 22:10:33,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:33,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:33,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:33,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:33,001 INFO L87 Difference]: Start difference. First operand 754 states and 2566 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:33,765 INFO L93 Difference]: Finished difference Result 1549 states and 4614 transitions. [2021-06-05 22:10:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:10:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:33,768 INFO L225 Difference]: With dead ends: 1549 [2021-06-05 22:10:33,768 INFO L226 Difference]: Without dead ends: 1549 [2021-06-05 22:10:33,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:10:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-06-05 22:10:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 755. [2021-06-05 22:10:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.419098143236074) internal successors, (2578), 754 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2578 transitions. [2021-06-05 22:10:33,779 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2578 transitions. Word has length 20 [2021-06-05 22:10:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:33,779 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2578 transitions. [2021-06-05 22:10:33,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2578 transitions. [2021-06-05 22:10:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:33,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:33,780 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:33,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6488 [2021-06-05 22:10:33,980 INFO L430 AbstractCegarLoop]: === Iteration 799 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:33,980 INFO L82 PathProgramCache]: Analyzing trace with hash -536469184, now seen corresponding path program 632 times [2021-06-05 22:10:33,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:33,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770455918] [2021-06-05 22:10:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:34,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:34,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770455918] [2021-06-05 22:10:34,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770455918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:34,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037674665] [2021-06-05 22:10:34,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:34,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:34,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:34,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:34,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037674665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:34,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:34,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:34,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498959331] [2021-06-05 22:10:34,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:34,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:34,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:34,287 INFO L87 Difference]: Start difference. First operand 755 states and 2578 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:34,786 INFO L93 Difference]: Finished difference Result 1206 states and 3740 transitions. [2021-06-05 22:10:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:10:34,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:34,788 INFO L225 Difference]: With dead ends: 1206 [2021-06-05 22:10:34,788 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 22:10:34,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 22:10:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 767. [2021-06-05 22:10:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.411227154046997) internal successors, (2613), 766 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2613 transitions. [2021-06-05 22:10:34,798 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2613 transitions. Word has length 20 [2021-06-05 22:10:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:34,798 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2613 transitions. [2021-06-05 22:10:34,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2613 transitions. [2021-06-05 22:10:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:34,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:34,799 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:34,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6495,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:34,999 INFO L430 AbstractCegarLoop]: === Iteration 800 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:34,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1831433640, now seen corresponding path program 633 times [2021-06-05 22:10:34,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:34,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136614028] [2021-06-05 22:10:35,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:35,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136614028] [2021-06-05 22:10:35,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136614028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449685962] [2021-06-05 22:10:35,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:35,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:35,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:35,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:35,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449685962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:35,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:35,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:35,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663214827] [2021-06-05 22:10:35,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:35,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:35,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:35,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:35,319 INFO L87 Difference]: Start difference. First operand 767 states and 2613 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:35,721 INFO L93 Difference]: Finished difference Result 1264 states and 3886 transitions. [2021-06-05 22:10:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:10:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:35,723 INFO L225 Difference]: With dead ends: 1264 [2021-06-05 22:10:35,723 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 22:10:35,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 22:10:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 765. [2021-06-05 22:10:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.413612565445026) internal successors, (2608), 764 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2608 transitions. [2021-06-05 22:10:35,733 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2608 transitions. Word has length 20 [2021-06-05 22:10:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:35,733 INFO L482 AbstractCegarLoop]: Abstraction has 765 states and 2608 transitions. [2021-06-05 22:10:35,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2608 transitions. [2021-06-05 22:10:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:35,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:35,734 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:35,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6503,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:35,935 INFO L430 AbstractCegarLoop]: === Iteration 801 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1400487060, now seen corresponding path program 634 times [2021-06-05 22:10:35,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:35,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396157089] [2021-06-05 22:10:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:35,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:35,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396157089] [2021-06-05 22:10:35,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396157089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:35,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038241140] [2021-06-05 22:10:35,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:36,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:36,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:36,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:36,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:36,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038241140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:36,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:36,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:36,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351216537] [2021-06-05 22:10:36,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:36,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:36,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:36,208 INFO L87 Difference]: Start difference. First operand 765 states and 2608 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:36,799 INFO L93 Difference]: Finished difference Result 1513 states and 4584 transitions. [2021-06-05 22:10:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:10:36,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:36,801 INFO L225 Difference]: With dead ends: 1513 [2021-06-05 22:10:36,801 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 22:10:36,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:10:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 22:10:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 766. [2021-06-05 22:10:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.4169934640522874) internal successors, (2614), 765 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2614 transitions. [2021-06-05 22:10:36,813 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2614 transitions. Word has length 20 [2021-06-05 22:10:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:36,813 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2614 transitions. [2021-06-05 22:10:36,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2614 transitions. [2021-06-05 22:10:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:36,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:36,814 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:37,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6513,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:37,014 INFO L430 AbstractCegarLoop]: === Iteration 802 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -108144660, now seen corresponding path program 635 times [2021-06-05 22:10:37,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:37,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046372776] [2021-06-05 22:10:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:37,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046372776] [2021-06-05 22:10:37,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046372776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377112295] [2021-06-05 22:10:37,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:37,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:37,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:37,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:37,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377112295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:37,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:37,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009502844] [2021-06-05 22:10:37,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:37,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:37,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:37,289 INFO L87 Difference]: Start difference. First operand 766 states and 2614 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:37,706 INFO L93 Difference]: Finished difference Result 1482 states and 4517 transitions. [2021-06-05 22:10:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:10:37,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:37,708 INFO L225 Difference]: With dead ends: 1482 [2021-06-05 22:10:37,708 INFO L226 Difference]: Without dead ends: 1482 [2021-06-05 22:10:37,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:10:37,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-05 22:10:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 765. [2021-06-05 22:10:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.413612565445026) internal successors, (2608), 764 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2608 transitions. [2021-06-05 22:10:37,720 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2608 transitions. Word has length 20 [2021-06-05 22:10:37,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:37,720 INFO L482 AbstractCegarLoop]: Abstraction has 765 states and 2608 transitions. [2021-06-05 22:10:37,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2608 transitions. [2021-06-05 22:10:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:37,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:37,721 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:37,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6521 [2021-06-05 22:10:37,921 INFO L430 AbstractCegarLoop]: === Iteration 803 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:37,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:37,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1379750532, now seen corresponding path program 636 times [2021-06-05 22:10:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:37,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044320280] [2021-06-05 22:10:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:37,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:37,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044320280] [2021-06-05 22:10:37,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044320280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:37,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147310014] [2021-06-05 22:10:37,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:38,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:38,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:38,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:38,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147310014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:38,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:38,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:38,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521973924] [2021-06-05 22:10:38,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:38,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:38,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:38,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:38,196 INFO L87 Difference]: Start difference. First operand 765 states and 2608 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:38,426 INFO L93 Difference]: Finished difference Result 1200 states and 3799 transitions. [2021-06-05 22:10:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:38,428 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 22:10:38,428 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 22:10:38,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 22:10:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 769. [2021-06-05 22:10:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.4166666666666665) internal successors, (2624), 768 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2624 transitions. [2021-06-05 22:10:38,438 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2624 transitions. Word has length 20 [2021-06-05 22:10:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:38,439 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2624 transitions. [2021-06-05 22:10:38,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2624 transitions. [2021-06-05 22:10:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:38,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:38,439 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:38,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6529,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:38,640 INFO L430 AbstractCegarLoop]: === Iteration 804 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:38,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:38,640 INFO L82 PathProgramCache]: Analyzing trace with hash 999792838, now seen corresponding path program 637 times [2021-06-05 22:10:38,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:38,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274300938] [2021-06-05 22:10:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:38,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:38,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274300938] [2021-06-05 22:10:38,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274300938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:38,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947298016] [2021-06-05 22:10:38,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:38,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947298016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:38,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:38,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485933531] [2021-06-05 22:10:38,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:38,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:38,915 INFO L87 Difference]: Start difference. First operand 769 states and 2624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:39,377 INFO L93 Difference]: Finished difference Result 1507 states and 4537 transitions. [2021-06-05 22:10:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:10:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:39,379 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 22:10:39,379 INFO L226 Difference]: Without dead ends: 1507 [2021-06-05 22:10:39,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 349.3ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:10:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-06-05 22:10:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 767. [2021-06-05 22:10:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.41644908616188) internal successors, (2617), 766 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2617 transitions. [2021-06-05 22:10:39,390 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2617 transitions. Word has length 20 [2021-06-05 22:10:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:39,390 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2617 transitions. [2021-06-05 22:10:39,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2617 transitions. [2021-06-05 22:10:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:39,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:39,391 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:39,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6537 [2021-06-05 22:10:39,592 INFO L430 AbstractCegarLoop]: === Iteration 805 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash 740181584, now seen corresponding path program 638 times [2021-06-05 22:10:39,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:39,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303983686] [2021-06-05 22:10:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:39,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:39,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303983686] [2021-06-05 22:10:39,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303983686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:39,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080793057] [2021-06-05 22:10:39,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:39,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:39,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:39,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:39,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:39,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080793057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:39,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:39,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:39,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433261697] [2021-06-05 22:10:39,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:39,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:39,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:39,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:39,899 INFO L87 Difference]: Start difference. First operand 767 states and 2617 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:40,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:40,314 INFO L93 Difference]: Finished difference Result 1210 states and 3770 transitions. [2021-06-05 22:10:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:40,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:40,315 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 22:10:40,315 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 22:10:40,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 22:10:40,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 755. [2021-06-05 22:10:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.4151193633952253) internal successors, (2575), 754 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2575 transitions. [2021-06-05 22:10:40,325 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2575 transitions. Word has length 20 [2021-06-05 22:10:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:40,325 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2575 transitions. [2021-06-05 22:10:40,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:40,325 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2575 transitions. [2021-06-05 22:10:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:40,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:40,326 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:40,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6544,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:40,526 INFO L430 AbstractCegarLoop]: === Iteration 806 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:40,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1776251878, now seen corresponding path program 639 times [2021-06-05 22:10:40,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:40,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325924311] [2021-06-05 22:10:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:40,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325924311] [2021-06-05 22:10:40,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325924311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:40,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547365087] [2021-06-05 22:10:40,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:40,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:40,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:40,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547365087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:40,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:40,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:40,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42948404] [2021-06-05 22:10:40,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:40,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:40,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:40,790 INFO L87 Difference]: Start difference. First operand 755 states and 2575 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:41,094 INFO L93 Difference]: Finished difference Result 1079 states and 3427 transitions. [2021-06-05 22:10:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:41,096 INFO L225 Difference]: With dead ends: 1079 [2021-06-05 22:10:41,096 INFO L226 Difference]: Without dead ends: 1065 [2021-06-05 22:10:41,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-06-05 22:10:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 757. [2021-06-05 22:10:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.4153439153439153) internal successors, (2582), 756 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2582 transitions. [2021-06-05 22:10:41,105 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2582 transitions. Word has length 20 [2021-06-05 22:10:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:41,105 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2582 transitions. [2021-06-05 22:10:41,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2582 transitions. [2021-06-05 22:10:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:41,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:41,106 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:41,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6558,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:41,306 INFO L430 AbstractCegarLoop]: === Iteration 807 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2128171906, now seen corresponding path program 640 times [2021-06-05 22:10:41,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:41,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743162459] [2021-06-05 22:10:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:41,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:41,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743162459] [2021-06-05 22:10:41,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743162459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:41,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757049985] [2021-06-05 22:10:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:41,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:41,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:41,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:41,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:41,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757049985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:41,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:41,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:41,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031850023] [2021-06-05 22:10:41,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:41,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:41,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:41,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:41,587 INFO L87 Difference]: Start difference. First operand 757 states and 2582 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:42,053 INFO L93 Difference]: Finished difference Result 1118 states and 3514 transitions. [2021-06-05 22:10:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:10:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:42,055 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 22:10:42,055 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:10:42,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:10:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 768. [2021-06-05 22:10:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.4041720990873534) internal successors, (2611), 767 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2611 transitions. [2021-06-05 22:10:42,064 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2611 transitions. Word has length 20 [2021-06-05 22:10:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:42,064 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2611 transitions. [2021-06-05 22:10:42,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2611 transitions. [2021-06-05 22:10:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:42,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:42,065 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:42,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6565 [2021-06-05 22:10:42,265 INFO L430 AbstractCegarLoop]: === Iteration 808 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1399949242, now seen corresponding path program 641 times [2021-06-05 22:10:42,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:42,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081078263] [2021-06-05 22:10:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:42,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081078263] [2021-06-05 22:10:42,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081078263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530733399] [2021-06-05 22:10:42,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:42,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:42,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:42,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530733399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:42,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:42,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:42,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107109204] [2021-06-05 22:10:42,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:42,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:42,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:42,537 INFO L87 Difference]: Start difference. First operand 768 states and 2611 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:42,817 INFO L93 Difference]: Finished difference Result 1138 states and 3576 transitions. [2021-06-05 22:10:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:42,817 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:42,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:42,819 INFO L225 Difference]: With dead ends: 1138 [2021-06-05 22:10:42,819 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 22:10:42,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:42,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 22:10:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 755. [2021-06-05 22:10:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.4151193633952253) internal successors, (2575), 754 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2575 transitions. [2021-06-05 22:10:42,828 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2575 transitions. Word has length 20 [2021-06-05 22:10:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:42,828 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2575 transitions. [2021-06-05 22:10:42,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2575 transitions. [2021-06-05 22:10:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:42,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:42,829 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:43,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6575 [2021-06-05 22:10:43,029 INFO L430 AbstractCegarLoop]: === Iteration 809 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:43,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1289866904, now seen corresponding path program 642 times [2021-06-05 22:10:43,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:43,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038539373] [2021-06-05 22:10:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:43,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:43,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038539373] [2021-06-05 22:10:43,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038539373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:43,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899145311] [2021-06-05 22:10:43,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:43,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:43,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:43,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:43,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:43,269 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 22:10:43,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:10:43,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 22:10:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899145311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:43,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:43,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:10:43,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991631034] [2021-06-05 22:10:43,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:10:43,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:43,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:10:43,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:10:43,292 INFO L87 Difference]: Start difference. First operand 755 states and 2575 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:43,632 INFO L93 Difference]: Finished difference Result 1183 states and 3670 transitions. [2021-06-05 22:10:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:10:43,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:43,634 INFO L225 Difference]: With dead ends: 1183 [2021-06-05 22:10:43,634 INFO L226 Difference]: Without dead ends: 1176 [2021-06-05 22:10:43,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-05 22:10:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 770. [2021-06-05 22:10:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.401820546163849) internal successors, (2616), 769 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2616 transitions. [2021-06-05 22:10:43,644 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2616 transitions. Word has length 20 [2021-06-05 22:10:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:43,644 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2616 transitions. [2021-06-05 22:10:43,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2616 transitions. [2021-06-05 22:10:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:43,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:43,645 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:43,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6580,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:43,845 INFO L430 AbstractCegarLoop]: === Iteration 810 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash 523020756, now seen corresponding path program 643 times [2021-06-05 22:10:43,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:43,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129437340] [2021-06-05 22:10:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:43,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129437340] [2021-06-05 22:10:43,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129437340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301268635] [2021-06-05 22:10:43,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:44,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:44,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:44,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:44,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:44,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:44,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:44,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:44,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:10:44,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-06-05 22:10:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:44,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301268635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:44,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:44,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:10:44,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220250909] [2021-06-05 22:10:44,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:10:44,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:10:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:10:44,111 INFO L87 Difference]: Start difference. First operand 770 states and 2616 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:44,596 INFO L93 Difference]: Finished difference Result 1247 states and 3843 transitions. [2021-06-05 22:10:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:10:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:44,598 INFO L225 Difference]: With dead ends: 1247 [2021-06-05 22:10:44,598 INFO L226 Difference]: Without dead ends: 1247 [2021-06-05 22:10:44,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-05 22:10:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 768. [2021-06-05 22:10:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.4041720990873534) internal successors, (2611), 767 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2611 transitions. [2021-06-05 22:10:44,608 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2611 transitions. Word has length 20 [2021-06-05 22:10:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:44,608 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2611 transitions. [2021-06-05 22:10:44,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2611 transitions. [2021-06-05 22:10:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:44,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:44,609 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:44,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6589,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:44,809 INFO L430 AbstractCegarLoop]: === Iteration 811 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1698511400, now seen corresponding path program 644 times [2021-06-05 22:10:44,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:44,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854358145] [2021-06-05 22:10:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:44,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:44,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854358145] [2021-06-05 22:10:44,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854358145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:44,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485724129] [2021-06-05 22:10:44,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:44,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:45,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:45,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:45,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:45,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:45,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:45,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:10:45,043 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-06-05 22:10:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:45,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485724129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:45,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:45,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:10:45,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978988069] [2021-06-05 22:10:45,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:10:45,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:45,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:10:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:10:45,053 INFO L87 Difference]: Start difference. First operand 768 states and 2611 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:45,263 INFO L93 Difference]: Finished difference Result 1142 states and 3588 transitions. [2021-06-05 22:10:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:10:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:45,265 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 22:10:45,265 INFO L226 Difference]: Without dead ends: 1142 [2021-06-05 22:10:45,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:10:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-05 22:10:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 753. [2021-06-05 22:10:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.4148936170212765) internal successors, (2568), 752 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2568 transitions. [2021-06-05 22:10:45,274 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2568 transitions. Word has length 20 [2021-06-05 22:10:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:45,274 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2568 transitions. [2021-06-05 22:10:45,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2568 transitions. [2021-06-05 22:10:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:45,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:45,275 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:45,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6599,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:45,475 INFO L430 AbstractCegarLoop]: === Iteration 812 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash 549345880, now seen corresponding path program 645 times [2021-06-05 22:10:45,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:45,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535205560] [2021-06-05 22:10:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:45,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:45,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535205560] [2021-06-05 22:10:45,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535205560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:45,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110790093] [2021-06-05 22:10:45,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:45,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:45,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:45,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110790093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:45,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:45,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:45,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769536034] [2021-06-05 22:10:45,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:45,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:45,729 INFO L87 Difference]: Start difference. First operand 753 states and 2568 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:45,950 INFO L93 Difference]: Finished difference Result 1220 states and 3826 transitions. [2021-06-05 22:10:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:45,952 INFO L225 Difference]: With dead ends: 1220 [2021-06-05 22:10:45,952 INFO L226 Difference]: Without dead ends: 1220 [2021-06-05 22:10:45,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-05 22:10:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 751. [2021-06-05 22:10:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.412) internal successors, (2559), 750 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2559 transitions. [2021-06-05 22:10:45,962 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2559 transitions. Word has length 20 [2021-06-05 22:10:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:45,962 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2559 transitions. [2021-06-05 22:10:45,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2559 transitions. [2021-06-05 22:10:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:45,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:45,962 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:46,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6608 [2021-06-05 22:10:46,163 INFO L430 AbstractCegarLoop]: === Iteration 813 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:46,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:46,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1732111960, now seen corresponding path program 646 times [2021-06-05 22:10:46,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:46,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282198246] [2021-06-05 22:10:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:46,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282198246] [2021-06-05 22:10:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282198246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214536671] [2021-06-05 22:10:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:46,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:46,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:46,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214536671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:46,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:46,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:46,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116307630] [2021-06-05 22:10:46,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:46,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:46,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:46,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:46,460 INFO L87 Difference]: Start difference. First operand 751 states and 2559 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:46,726 INFO L93 Difference]: Finished difference Result 1249 states and 3889 transitions. [2021-06-05 22:10:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:10:46,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:46,728 INFO L225 Difference]: With dead ends: 1249 [2021-06-05 22:10:46,728 INFO L226 Difference]: Without dead ends: 1249 [2021-06-05 22:10:46,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-06-05 22:10:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 748. [2021-06-05 22:10:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.4069611780455156) internal successors, (2545), 747 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2545 transitions. [2021-06-05 22:10:46,738 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2545 transitions. Word has length 20 [2021-06-05 22:10:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:46,738 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2545 transitions. [2021-06-05 22:10:46,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2545 transitions. [2021-06-05 22:10:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:46,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:46,739 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:46,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6611,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:46,939 INFO L430 AbstractCegarLoop]: === Iteration 814 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash -225024996, now seen corresponding path program 647 times [2021-06-05 22:10:46,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:46,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639827763] [2021-06-05 22:10:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:46,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:46,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639827763] [2021-06-05 22:10:46,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639827763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:46,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215847976] [2021-06-05 22:10:46,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:47,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:47,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:47,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:47,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215847976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:47,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:47,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518309208] [2021-06-05 22:10:47,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:47,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:47,193 INFO L87 Difference]: Start difference. First operand 748 states and 2545 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:47,408 INFO L93 Difference]: Finished difference Result 1206 states and 3792 transitions. [2021-06-05 22:10:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:47,410 INFO L225 Difference]: With dead ends: 1206 [2021-06-05 22:10:47,410 INFO L226 Difference]: Without dead ends: 1206 [2021-06-05 22:10:47,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-05 22:10:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 736. [2021-06-05 22:10:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.404081632653061) internal successors, (2502), 735 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2502 transitions. [2021-06-05 22:10:47,420 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2502 transitions. Word has length 20 [2021-06-05 22:10:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:47,420 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2502 transitions. [2021-06-05 22:10:47,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2502 transitions. [2021-06-05 22:10:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:47,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:47,421 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:47,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6616 [2021-06-05 22:10:47,621 INFO L430 AbstractCegarLoop]: === Iteration 815 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1392510632, now seen corresponding path program 648 times [2021-06-05 22:10:47,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:47,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642756576] [2021-06-05 22:10:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:47,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:47,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642756576] [2021-06-05 22:10:47,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642756576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:47,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931735773] [2021-06-05 22:10:47,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:47,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:47,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:47,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:47,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:47,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:47,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:47,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:47,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:47,866 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:10:47,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:10:47,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:10:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931735773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:47,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:47,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:10:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312330156] [2021-06-05 22:10:47,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:10:47,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:10:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:10:47,893 INFO L87 Difference]: Start difference. First operand 736 states and 2502 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:48,090 INFO L93 Difference]: Finished difference Result 1286 states and 3996 transitions. [2021-06-05 22:10:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:48,092 INFO L225 Difference]: With dead ends: 1286 [2021-06-05 22:10:48,092 INFO L226 Difference]: Without dead ends: 1286 [2021-06-05 22:10:48,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:10:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-06-05 22:10:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 740. [2021-06-05 22:10:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.4100135317997293) internal successors, (2520), 739 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2520 transitions. [2021-06-05 22:10:48,102 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2520 transitions. Word has length 20 [2021-06-05 22:10:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:48,102 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2520 transitions. [2021-06-05 22:10:48,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2520 transitions. [2021-06-05 22:10:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:48,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:48,103 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:48,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6622,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:48,303 INFO L430 AbstractCegarLoop]: === Iteration 816 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash -564626324, now seen corresponding path program 649 times [2021-06-05 22:10:48,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:48,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060468457] [2021-06-05 22:10:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:48,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:48,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060468457] [2021-06-05 22:10:48,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060468457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:48,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582518213] [2021-06-05 22:10:48,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:48,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:48,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:48,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:48,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:48,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:48,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:48,563 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:10:48,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:10:48,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:10:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:48,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582518213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:48,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:48,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:10:48,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917612560] [2021-06-05 22:10:48,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:10:48,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:48,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:10:48,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:10:48,589 INFO L87 Difference]: Start difference. First operand 740 states and 2520 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:48,811 INFO L93 Difference]: Finished difference Result 1292 states and 4011 transitions. [2021-06-05 22:10:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:48,813 INFO L225 Difference]: With dead ends: 1292 [2021-06-05 22:10:48,813 INFO L226 Difference]: Without dead ends: 1292 [2021-06-05 22:10:48,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:10:48,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-06-05 22:10:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 739. [2021-06-05 22:10:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.4065040650406506) internal successors, (2514), 738 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2514 transitions. [2021-06-05 22:10:48,823 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2514 transitions. Word has length 20 [2021-06-05 22:10:48,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:48,823 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2514 transitions. [2021-06-05 22:10:48,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2514 transitions. [2021-06-05 22:10:48,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:48,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:48,824 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:49,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6628 [2021-06-05 22:10:49,024 INFO L430 AbstractCegarLoop]: === Iteration 817 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1048940410, now seen corresponding path program 650 times [2021-06-05 22:10:49,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:49,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738105649] [2021-06-05 22:10:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:49,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:49,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738105649] [2021-06-05 22:10:49,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738105649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:49,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329236549] [2021-06-05 22:10:49,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:49,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:49,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:49,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:49,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:49,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:49,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:49,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:49,277 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 22:10:49,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:10:49,277 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 22:10:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:49,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329236549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:49,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:49,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:10:49,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812925635] [2021-06-05 22:10:49,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:10:49,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:10:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:10:49,308 INFO L87 Difference]: Start difference. First operand 739 states and 2514 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:49,512 INFO L93 Difference]: Finished difference Result 1250 states and 3904 transitions. [2021-06-05 22:10:49,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:49,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:49,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:49,514 INFO L225 Difference]: With dead ends: 1250 [2021-06-05 22:10:49,514 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 22:10:49,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 22:10:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 733. [2021-06-05 22:10:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.401639344262295) internal successors, (2490), 732 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2490 transitions. [2021-06-05 22:10:49,524 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2490 transitions. Word has length 20 [2021-06-05 22:10:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:49,524 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2490 transitions. [2021-06-05 22:10:49,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2490 transitions. [2021-06-05 22:10:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:49,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:49,525 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:49,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6635,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:49,725 INFO L430 AbstractCegarLoop]: === Iteration 818 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:49,726 INFO L82 PathProgramCache]: Analyzing trace with hash 21523618, now seen corresponding path program 651 times [2021-06-05 22:10:49,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:49,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811809143] [2021-06-05 22:10:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:49,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:49,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811809143] [2021-06-05 22:10:49,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811809143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:49,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62143115] [2021-06-05 22:10:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:49,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:49,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:49,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:49,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:49,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:49,986 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 22:10:49,987 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-06-05 22:10:49,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:49,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:50,024 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:10:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:50,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:50,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:50,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:50,046 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:10:50,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:50,046 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:10:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:50,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62143115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:50,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:50,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:50,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421883835] [2021-06-05 22:10:50,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:50,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:50,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:50,116 INFO L87 Difference]: Start difference. First operand 733 states and 2490 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:50,622 INFO L93 Difference]: Finished difference Result 1623 states and 4841 transitions. [2021-06-05 22:10:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:10:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:50,624 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 22:10:50,624 INFO L226 Difference]: Without dead ends: 1623 [2021-06-05 22:10:50,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:10:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-05 22:10:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 741. [2021-06-05 22:10:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.4135135135135135) internal successors, (2526), 740 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2526 transitions. [2021-06-05 22:10:50,635 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2526 transitions. Word has length 20 [2021-06-05 22:10:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:50,635 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2526 transitions. [2021-06-05 22:10:50,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2526 transitions. [2021-06-05 22:10:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:50,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:50,636 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:50,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6642 [2021-06-05 22:10:50,837 INFO L430 AbstractCegarLoop]: === Iteration 819 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1472384104, now seen corresponding path program 652 times [2021-06-05 22:10:50,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:50,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984592643] [2021-06-05 22:10:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:50,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:50,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984592643] [2021-06-05 22:10:50,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984592643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:50,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669868712] [2021-06-05 22:10:50,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:51,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:51,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:51,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:51,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:51,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:51,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:51,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:10:51,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:51,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:51,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:51,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:51,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:51,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:51,095 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 22:10:51,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:51,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:10:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:51,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669868712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:51,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:51,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:51,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242638805] [2021-06-05 22:10:51,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:51,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:51,154 INFO L87 Difference]: Start difference. First operand 741 states and 2526 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:51,441 INFO L93 Difference]: Finished difference Result 1320 states and 4115 transitions. [2021-06-05 22:10:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:10:51,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:51,442 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 22:10:51,442 INFO L226 Difference]: Without dead ends: 1314 [2021-06-05 22:10:51,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-05 22:10:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 744. [2021-06-05 22:10:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.4024226110363394) internal successors, (2528), 743 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2528 transitions. [2021-06-05 22:10:51,452 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2528 transitions. Word has length 20 [2021-06-05 22:10:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:51,452 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2528 transitions. [2021-06-05 22:10:51,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2528 transitions. [2021-06-05 22:10:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:51,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:51,453 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:51,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 681 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6652 [2021-06-05 22:10:51,654 INFO L430 AbstractCegarLoop]: === Iteration 820 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1636941932, now seen corresponding path program 653 times [2021-06-05 22:10:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:51,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349061024] [2021-06-05 22:10:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:51,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:51,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349061024] [2021-06-05 22:10:51,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349061024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:51,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247801294] [2021-06-05 22:10:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:51,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:51,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:51,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:51,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:51,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:51,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:51,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:51,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:51,920 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2021-06-05 22:10:51,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:51,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:51,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:51,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:51,941 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:10:51,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-06-05 22:10:51,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:51,941 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 22:10:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:51,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247801294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:51,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:51,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:51,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039144230] [2021-06-05 22:10:51,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:51,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:51,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:51,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:51,997 INFO L87 Difference]: Start difference. First operand 744 states and 2528 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:52,362 INFO L93 Difference]: Finished difference Result 1286 states and 3965 transitions. [2021-06-05 22:10:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:10:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:52,364 INFO L225 Difference]: With dead ends: 1286 [2021-06-05 22:10:52,364 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 22:10:52,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 22:10:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 751. [2021-06-05 22:10:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.388) internal successors, (2541), 750 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2541 transitions. [2021-06-05 22:10:52,374 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2541 transitions. Word has length 20 [2021-06-05 22:10:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:52,374 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2541 transitions. [2021-06-05 22:10:52,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2541 transitions. [2021-06-05 22:10:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:52,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:52,374 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:52,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6663 [2021-06-05 22:10:52,575 INFO L430 AbstractCegarLoop]: === Iteration 821 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash -290122540, now seen corresponding path program 654 times [2021-06-05 22:10:52,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:52,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140620378] [2021-06-05 22:10:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:52,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:52,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140620378] [2021-06-05 22:10:52,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140620378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:52,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792448442] [2021-06-05 22:10:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:52,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:52,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:52,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:52,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:52,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:52,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:52,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:52,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:52,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,857 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 22:10:52,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:52,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:52,879 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:10:52,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:52,879 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:91, output treesize:20 [2021-06-05 22:10:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:52,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792448442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:52,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:52,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:52,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634221906] [2021-06-05 22:10:52,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:52,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:52,934 INFO L87 Difference]: Start difference. First operand 751 states and 2541 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:53,473 INFO L93 Difference]: Finished difference Result 1459 states and 4371 transitions. [2021-06-05 22:10:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:10:53,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:53,475 INFO L225 Difference]: With dead ends: 1459 [2021-06-05 22:10:53,475 INFO L226 Difference]: Without dead ends: 1459 [2021-06-05 22:10:53,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-05 22:10:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 749. [2021-06-05 22:10:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.390374331550802) internal successors, (2536), 748 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2536 transitions. [2021-06-05 22:10:53,486 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2536 transitions. Word has length 20 [2021-06-05 22:10:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:53,486 INFO L482 AbstractCegarLoop]: Abstraction has 749 states and 2536 transitions. [2021-06-05 22:10:53,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2536 transitions. [2021-06-05 22:10:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:53,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:53,487 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:53,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6676,683 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:53,687 INFO L430 AbstractCegarLoop]: === Iteration 822 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:53,687 INFO L82 PathProgramCache]: Analyzing trace with hash 772924056, now seen corresponding path program 655 times [2021-06-05 22:10:53,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:53,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590951589] [2021-06-05 22:10:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:53,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590951589] [2021-06-05 22:10:53,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590951589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187311714] [2021-06-05 22:10:53,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:53,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:53,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:53,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,949 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-06-05 22:10:53,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:10:53,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:53,970 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-06-05 22:10:53,970 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:53,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:53,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:10:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:54,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187311714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:54,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:54,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:54,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178989621] [2021-06-05 22:10:54,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:54,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:54,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:54,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:54,033 INFO L87 Difference]: Start difference. First operand 749 states and 2536 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:54,512 INFO L93 Difference]: Finished difference Result 1633 states and 4893 transitions. [2021-06-05 22:10:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:10:54,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:54,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:54,514 INFO L225 Difference]: With dead ends: 1633 [2021-06-05 22:10:54,514 INFO L226 Difference]: Without dead ends: 1633 [2021-06-05 22:10:54,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-06-05 22:10:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 750. [2021-06-05 22:10:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3938584779706273) internal successors, (2542), 749 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2542 transitions. [2021-06-05 22:10:54,525 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2542 transitions. Word has length 20 [2021-06-05 22:10:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:54,525 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2542 transitions. [2021-06-05 22:10:54,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2542 transitions. [2021-06-05 22:10:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:54,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:54,526 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:54,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6689,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:54,726 INFO L430 AbstractCegarLoop]: === Iteration 823 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:54,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2065266456, now seen corresponding path program 656 times [2021-06-05 22:10:54,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:54,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289718387] [2021-06-05 22:10:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:54,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:54,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289718387] [2021-06-05 22:10:54,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289718387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:54,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147229021] [2021-06-05 22:10:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:54,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:54,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:54,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:54,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:54,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:54,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:54,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:54,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:54,989 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-06-05 22:10:54,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:10:54,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:55,011 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-06-05 22:10:55,011 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:55,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:55,012 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:10:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:55,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147229021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:55,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:55,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:55,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940784631] [2021-06-05 22:10:55,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:55,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:55,073 INFO L87 Difference]: Start difference. First operand 750 states and 2542 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:55,566 INFO L93 Difference]: Finished difference Result 1602 states and 4826 transitions. [2021-06-05 22:10:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:10:55,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:55,568 INFO L225 Difference]: With dead ends: 1602 [2021-06-05 22:10:55,568 INFO L226 Difference]: Without dead ends: 1602 [2021-06-05 22:10:55,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-06-05 22:10:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 749. [2021-06-05 22:10:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.390374331550802) internal successors, (2536), 748 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2536 transitions. [2021-06-05 22:10:55,579 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2536 transitions. Word has length 20 [2021-06-05 22:10:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:55,579 INFO L482 AbstractCegarLoop]: Abstraction has 749 states and 2536 transitions. [2021-06-05 22:10:55,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2536 transitions. [2021-06-05 22:10:55,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:55,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:55,580 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:55,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6700 [2021-06-05 22:10:55,781 INFO L430 AbstractCegarLoop]: === Iteration 824 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash 793660584, now seen corresponding path program 657 times [2021-06-05 22:10:55,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:55,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517425943] [2021-06-05 22:10:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:55,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:55,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517425943] [2021-06-05 22:10:55,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517425943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:55,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929164606] [2021-06-05 22:10:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:55,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:10:55,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:55,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:56,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:56,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,041 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 22:10:56,041 INFO L518 ElimStorePlain]: Eliminatee v_prenex_35 vanished before elimination [2021-06-05 22:10:56,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:56,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,072 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:10:56,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:56,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:56,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,101 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:10:56,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:56,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:10:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:56,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929164606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:56,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:56,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:56,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007258995] [2021-06-05 22:10:56,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:56,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:56,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:56,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:56,191 INFO L87 Difference]: Start difference. First operand 749 states and 2536 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:56,523 INFO L93 Difference]: Finished difference Result 1374 states and 4234 transitions. [2021-06-05 22:10:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:10:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:56,525 INFO L225 Difference]: With dead ends: 1374 [2021-06-05 22:10:56,525 INFO L226 Difference]: Without dead ends: 1368 [2021-06-05 22:10:56,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:10:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-06-05 22:10:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 753. [2021-06-05 22:10:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.393617021276596) internal successors, (2552), 752 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2552 transitions. [2021-06-05 22:10:56,535 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2552 transitions. Word has length 20 [2021-06-05 22:10:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:56,535 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2552 transitions. [2021-06-05 22:10:56,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2552 transitions. [2021-06-05 22:10:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:56,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:56,536 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:56,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6711,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:56,737 INFO L430 AbstractCegarLoop]: === Iteration 825 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1121763342, now seen corresponding path program 658 times [2021-06-05 22:10:56,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:56,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352789373] [2021-06-05 22:10:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:56,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:56,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352789373] [2021-06-05 22:10:56,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352789373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:56,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986378315] [2021-06-05 22:10:56,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:56,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:56,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:56,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:56,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:56,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:56,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:10:56,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:56,995 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 22:10:56,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:56,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:57,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,017 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:10:57,017 INFO L518 ElimStorePlain]: Eliminatee v_prenex_38 vanished before elimination [2021-06-05 22:10:57,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:57,018 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-06-05 22:10:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:57,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986378315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:57,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:57,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:57,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375534613] [2021-06-05 22:10:57,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:57,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:57,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:57,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:57,084 INFO L87 Difference]: Start difference. First operand 753 states and 2552 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:57,795 INFO L93 Difference]: Finished difference Result 1836 states and 5336 transitions. [2021-06-05 22:10:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:10:57,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:57,797 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 22:10:57,797 INFO L226 Difference]: Without dead ends: 1836 [2021-06-05 22:10:57,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:10:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-06-05 22:10:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 751. [2021-06-05 22:10:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3933333333333335) internal successors, (2545), 750 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2545 transitions. [2021-06-05 22:10:57,809 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2545 transitions. Word has length 20 [2021-06-05 22:10:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:57,809 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2545 transitions. [2021-06-05 22:10:57,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2545 transitions. [2021-06-05 22:10:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:57,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:57,810 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:58,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6722,687 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:58,011 INFO L430 AbstractCegarLoop]: === Iteration 826 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:58,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1381374596, now seen corresponding path program 659 times [2021-06-05 22:10:58,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:58,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921230281] [2021-06-05 22:10:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:58,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921230281] [2021-06-05 22:10:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921230281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863480537] [2021-06-05 22:10:58,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:58,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:58,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:58,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:58,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:58,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,281 INFO L628 ElimStorePlain]: treesize reduction 25, result has 58.3 percent of original size [2021-06-05 22:10:58,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_41 vanished before elimination [2021-06-05 22:10:58,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:58,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:58,303 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:10:58,303 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:10:58,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:58,303 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:20 [2021-06-05 22:10:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:58,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863480537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:58,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:58,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:10:58,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414723638] [2021-06-05 22:10:58,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:10:58,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:58,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:10:58,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:10:58,362 INFO L87 Difference]: Start difference. First operand 751 states and 2545 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:58,892 INFO L93 Difference]: Finished difference Result 1396 states and 4260 transitions. [2021-06-05 22:10:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:10:58,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:58,894 INFO L225 Difference]: With dead ends: 1396 [2021-06-05 22:10:58,894 INFO L226 Difference]: Without dead ends: 1396 [2021-06-05 22:10:58,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:10:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-06-05 22:10:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 750. [2021-06-05 22:10:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3898531375166887) internal successors, (2539), 749 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2539 transitions. [2021-06-05 22:10:58,904 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2539 transitions. Word has length 20 [2021-06-05 22:10:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:58,904 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2539 transitions. [2021-06-05 22:10:58,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2539 transitions. [2021-06-05 22:10:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:58,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:58,905 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:59,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6735,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:59,106 INFO L430 AbstractCegarLoop]: === Iteration 827 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash -475486698, now seen corresponding path program 660 times [2021-06-05 22:10:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:59,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211954418] [2021-06-05 22:10:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:59,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211954418] [2021-06-05 22:10:59,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211954418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107072296] [2021-06-05 22:10:59,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:59,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:10:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:59,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:10:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:59,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:10:59,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,369 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-06-05 22:10:59,369 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-05 22:10:59,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:10:59,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:10:59,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,390 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:10:59,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:59,391 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 22:10:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:59,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107072296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:59,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:59,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:10:59,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179208442] [2021-06-05 22:10:59,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:10:59,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:59,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:10:59,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:10:59,430 INFO L87 Difference]: Start difference. First operand 750 states and 2539 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:59,702 INFO L93 Difference]: Finished difference Result 1306 states and 4011 transitions. [2021-06-05 22:10:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:10:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:10:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:59,704 INFO L225 Difference]: With dead ends: 1306 [2021-06-05 22:10:59,704 INFO L226 Difference]: Without dead ends: 1299 [2021-06-05 22:10:59,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-05 22:10:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 758. [2021-06-05 22:10:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.3883751651254954) internal successors, (2565), 757 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2565 transitions. [2021-06-05 22:10:59,714 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2565 transitions. Word has length 20 [2021-06-05 22:10:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:59,714 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2565 transitions. [2021-06-05 22:10:59,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2565 transitions. [2021-06-05 22:10:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:10:59,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:59,715 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:59,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6745,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:59,915 INFO L430 AbstractCegarLoop]: === Iteration 828 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:59,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1892416126, now seen corresponding path program 661 times [2021-06-05 22:10:59,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:59,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766162089] [2021-06-05 22:10:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:59,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:59,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766162089] [2021-06-05 22:10:59,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766162089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:59,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817747228] [2021-06-05 22:10:59,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:00,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:00,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:00,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:00,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:00,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:00,177 INFO L628 ElimStorePlain]: treesize reduction 25, result has 58.3 percent of original size [2021-06-05 22:11:00,177 INFO L518 ElimStorePlain]: Eliminatee v_prenex_46 vanished before elimination [2021-06-05 22:11:00,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:00,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:00,199 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:11:00,199 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:00,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:00,200 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:20 [2021-06-05 22:11:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:00,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817747228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:00,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:00,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:00,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63528997] [2021-06-05 22:11:00,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:00,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:00,239 INFO L87 Difference]: Start difference. First operand 758 states and 2565 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:00,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:00,658 INFO L93 Difference]: Finished difference Result 1399 states and 4238 transitions. [2021-06-05 22:11:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:11:00,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:00,660 INFO L225 Difference]: With dead ends: 1399 [2021-06-05 22:11:00,660 INFO L226 Difference]: Without dead ends: 1399 [2021-06-05 22:11:00,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:11:00,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-06-05 22:11:00,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 756. [2021-06-05 22:11:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.390728476821192) internal successors, (2560), 755 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2560 transitions. [2021-06-05 22:11:00,670 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2560 transitions. Word has length 20 [2021-06-05 22:11:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:00,670 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2560 transitions. [2021-06-05 22:11:00,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2560 transitions. [2021-06-05 22:11:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:00,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:00,671 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:00,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6759 [2021-06-05 22:11:00,871 INFO L430 AbstractCegarLoop]: === Iteration 829 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash -629723868, now seen corresponding path program 662 times [2021-06-05 22:11:00,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:00,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070462500] [2021-06-05 22:11:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:00,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:00,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070462500] [2021-06-05 22:11:00,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070462500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:00,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497794410] [2021-06-05 22:11:00,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:01,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:01,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:01,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:01,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:01,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:01,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:01,147 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.8 percent of original size [2021-06-05 22:11:01,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:01,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:01,170 INFO L628 ElimStorePlain]: treesize reduction 20, result has 50.0 percent of original size [2021-06-05 22:11:01,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-06-05 22:11:01,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:01,170 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 22:11:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:01,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497794410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:01,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:01,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:11:01,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732003238] [2021-06-05 22:11:01,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:11:01,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:11:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:11:01,198 INFO L87 Difference]: Start difference. First operand 756 states and 2560 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:01,416 INFO L93 Difference]: Finished difference Result 1321 states and 4071 transitions. [2021-06-05 22:11:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:01,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:01,417 INFO L225 Difference]: With dead ends: 1321 [2021-06-05 22:11:01,417 INFO L226 Difference]: Without dead ends: 1321 [2021-06-05 22:11:01,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:11:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-06-05 22:11:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 754. [2021-06-05 22:11:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3930942895086322) internal successors, (2555), 753 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2555 transitions. [2021-06-05 22:11:01,427 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2555 transitions. Word has length 20 [2021-06-05 22:11:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:01,427 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2555 transitions. [2021-06-05 22:11:01,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2555 transitions. [2021-06-05 22:11:01,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:01,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:01,428 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:01,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6769,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:01,629 INFO L430 AbstractCegarLoop]: === Iteration 830 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1761990300, now seen corresponding path program 663 times [2021-06-05 22:11:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:01,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463725305] [2021-06-05 22:11:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:01,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:01,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463725305] [2021-06-05 22:11:01,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463725305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:01,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749213385] [2021-06-05 22:11:01,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:01,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:11:01,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:01,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:01,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:01,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:01,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:01,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:01,876 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:11:01,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:01,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:01,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:01,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:01,887 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:01,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749213385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:01,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:01,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:01,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558629173] [2021-06-05 22:11:01,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:01,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:01,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:01,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:01,949 INFO L87 Difference]: Start difference. First operand 754 states and 2555 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:02,207 INFO L93 Difference]: Finished difference Result 1509 states and 4626 transitions. [2021-06-05 22:11:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:02,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:02,209 INFO L225 Difference]: With dead ends: 1509 [2021-06-05 22:11:02,209 INFO L226 Difference]: Without dead ends: 1509 [2021-06-05 22:11:02,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-05 22:11:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 753. [2021-06-05 22:11:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3882978723404253) internal successors, (2548), 752 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-06-05 22:11:02,220 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 20 [2021-06-05 22:11:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:02,220 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-06-05 22:11:02,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-06-05 22:11:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:02,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:02,221 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:02,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6782 [2021-06-05 22:11:02,421 INFO L430 AbstractCegarLoop]: === Iteration 831 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash -469647900, now seen corresponding path program 664 times [2021-06-05 22:11:02,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:02,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847343691] [2021-06-05 22:11:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:02,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:02,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847343691] [2021-06-05 22:11:02,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847343691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:02,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411909218] [2021-06-05 22:11:02,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:02,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:02,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:02,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:02,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:02,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:02,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:02,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:02,660 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:11:02,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:02,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:02,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:02,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:02,670 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:02,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411909218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:02,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:02,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:02,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090621631] [2021-06-05 22:11:02,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:02,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:02,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:02,734 INFO L87 Difference]: Start difference. First operand 753 states and 2548 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:02,973 INFO L93 Difference]: Finished difference Result 1503 states and 4608 transitions. [2021-06-05 22:11:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:02,975 INFO L225 Difference]: With dead ends: 1503 [2021-06-05 22:11:02,975 INFO L226 Difference]: Without dead ends: 1503 [2021-06-05 22:11:02,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-06-05 22:11:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 744. [2021-06-05 22:11:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.391655450874832) internal successors, (2520), 743 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2520 transitions. [2021-06-05 22:11:02,986 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2520 transitions. Word has length 20 [2021-06-05 22:11:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:02,986 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2520 transitions. [2021-06-05 22:11:02,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2520 transitions. [2021-06-05 22:11:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:02,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:02,987 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:03,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6792 [2021-06-05 22:11:03,187 INFO L430 AbstractCegarLoop]: === Iteration 832 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:03,187 INFO L82 PathProgramCache]: Analyzing trace with hash -428975754, now seen corresponding path program 665 times [2021-06-05 22:11:03,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:03,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173181520] [2021-06-05 22:11:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:03,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:03,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173181520] [2021-06-05 22:11:03,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173181520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:03,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081522242] [2021-06-05 22:11:03,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:03,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:03,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:03,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:03,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:03,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:03,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:03,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:03,453 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-06-05 22:11:03,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:11:03,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:03,473 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-06-05 22:11:03,473 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:03,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:03,474 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:03,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081522242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:03,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:03,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:11:03,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323543244] [2021-06-05 22:11:03,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:11:03,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:03,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:11:03,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:11:03,522 INFO L87 Difference]: Start difference. First operand 744 states and 2520 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:03,858 INFO L93 Difference]: Finished difference Result 1474 states and 4542 transitions. [2021-06-05 22:11:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:11:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:03,860 INFO L225 Difference]: With dead ends: 1474 [2021-06-05 22:11:03,860 INFO L226 Difference]: Without dead ends: 1474 [2021-06-05 22:11:03,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:11:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-06-05 22:11:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 741. [2021-06-05 22:11:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.389189189189189) internal successors, (2508), 740 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2508 transitions. [2021-06-05 22:11:03,871 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2508 transitions. Word has length 20 [2021-06-05 22:11:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:03,871 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2508 transitions. [2021-06-05 22:11:03,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2508 transitions. [2021-06-05 22:11:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:03,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:03,871 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:04,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6803,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:04,072 INFO L430 AbstractCegarLoop]: === Iteration 833 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:04,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1286256346, now seen corresponding path program 666 times [2021-06-05 22:11:04,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:04,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362256071] [2021-06-05 22:11:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:04,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:04,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362256071] [2021-06-05 22:11:04,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362256071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:04,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035413147] [2021-06-05 22:11:04,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:04,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:04,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:04,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:04,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:04,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:04,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:04,311 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:11:04,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:04,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:04,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:04,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:04,322 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:04,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035413147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:04,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:04,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:04,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968683313] [2021-06-05 22:11:04,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:04,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:04,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:04,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:04,360 INFO L87 Difference]: Start difference. First operand 741 states and 2508 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:04,611 INFO L93 Difference]: Finished difference Result 1273 states and 3973 transitions. [2021-06-05 22:11:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:11:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:04,613 INFO L225 Difference]: With dead ends: 1273 [2021-06-05 22:11:04,613 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 22:11:04,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 22:11:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 755. [2021-06-05 22:11:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.383289124668435) internal successors, (2551), 754 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2551 transitions. [2021-06-05 22:11:04,623 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2551 transitions. Word has length 20 [2021-06-05 22:11:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:04,623 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2551 transitions. [2021-06-05 22:11:04,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2551 transitions. [2021-06-05 22:11:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:04,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:04,624 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:04,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6814 [2021-06-05 22:11:04,824 INFO L430 AbstractCegarLoop]: === Iteration 834 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash -629167580, now seen corresponding path program 667 times [2021-06-05 22:11:04,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:04,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339995172] [2021-06-05 22:11:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:04,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:04,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339995172] [2021-06-05 22:11:04,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339995172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:04,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730246618] [2021-06-05 22:11:04,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:04,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:05,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:05,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:05,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:05,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:05,075 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.5 percent of original size [2021-06-05 22:11:05,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:05,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:05,097 INFO L628 ElimStorePlain]: treesize reduction 10, result has 73.0 percent of original size [2021-06-05 22:11:05,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:05,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:05,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:05,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:05,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-06-05 22:11:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:05,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730246618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:05,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:05,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:05,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721390337] [2021-06-05 22:11:05,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:05,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:05,147 INFO L87 Difference]: Start difference. First operand 755 states and 2551 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:05,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:05,745 INFO L93 Difference]: Finished difference Result 1617 states and 4794 transitions. [2021-06-05 22:11:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:11:05,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:05,747 INFO L225 Difference]: With dead ends: 1617 [2021-06-05 22:11:05,747 INFO L226 Difference]: Without dead ends: 1617 [2021-06-05 22:11:05,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:11:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-06-05 22:11:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 753. [2021-06-05 22:11:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.382978723404255) internal successors, (2544), 752 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2544 transitions. [2021-06-05 22:11:05,758 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2544 transitions. Word has length 20 [2021-06-05 22:11:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:05,758 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2544 transitions. [2021-06-05 22:11:05,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2544 transitions. [2021-06-05 22:11:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:05,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:05,759 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:05,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6824,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:05,960 INFO L430 AbstractCegarLoop]: === Iteration 835 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:05,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:05,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1957865000, now seen corresponding path program 668 times [2021-06-05 22:11:05,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:05,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586227106] [2021-06-05 22:11:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:06,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586227106] [2021-06-05 22:11:06,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586227106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240436149] [2021-06-05 22:11:06,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:06,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:06,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:06,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:06,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:06,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:06,212 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 22:11:06,212 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-06-05 22:11:06,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:06,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:06,243 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:11:06,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:06,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:06,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:06,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:06,265 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:06,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:06,265 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:11:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:06,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240436149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:06,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:06,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:11:06,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997764443] [2021-06-05 22:11:06,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:11:06,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:11:06,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:11:06,292 INFO L87 Difference]: Start difference. First operand 753 states and 2544 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:06,528 INFO L93 Difference]: Finished difference Result 1346 states and 4159 transitions. [2021-06-05 22:11:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:06,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:06,529 INFO L225 Difference]: With dead ends: 1346 [2021-06-05 22:11:06,529 INFO L226 Difference]: Without dead ends: 1346 [2021-06-05 22:11:06,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-06-05 22:11:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 741. [2021-06-05 22:11:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.389189189189189) internal successors, (2508), 740 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2508 transitions. [2021-06-05 22:11:06,539 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2508 transitions. Word has length 20 [2021-06-05 22:11:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:06,539 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2508 transitions. [2021-06-05 22:11:06,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2508 transitions. [2021-06-05 22:11:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:06,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:06,540 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:06,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6838 [2021-06-05 22:11:06,741 INFO L430 AbstractCegarLoop]: === Iteration 836 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1311264560, now seen corresponding path program 669 times [2021-06-05 22:11:06,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:06,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843457994] [2021-06-05 22:11:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:06,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:06,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843457994] [2021-06-05 22:11:06,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843457994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:06,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500391147] [2021-06-05 22:11:06,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:06,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:06,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:07,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:07,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:07,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,042 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2021-06-05 22:11:07,042 INFO L518 ElimStorePlain]: Eliminatee v_prenex_60 vanished before elimination [2021-06-05 22:11:07,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:07,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:07,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,063 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:07,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:07,064 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 22:11:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:07,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500391147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:07,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:07,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:07,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421038518] [2021-06-05 22:11:07,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:07,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:07,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:07,119 INFO L87 Difference]: Start difference. First operand 741 states and 2508 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:07,403 INFO L93 Difference]: Finished difference Result 1279 states and 3945 transitions. [2021-06-05 22:11:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:07,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:07,405 INFO L225 Difference]: With dead ends: 1279 [2021-06-05 22:11:07,405 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 22:11:07,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 22:11:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 738. [2021-06-05 22:11:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.382632293080054) internal successors, (2493), 737 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2493 transitions. [2021-06-05 22:11:07,415 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2493 transitions. Word has length 20 [2021-06-05 22:11:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:07,415 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2493 transitions. [2021-06-05 22:11:07,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2493 transitions. [2021-06-05 22:11:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:07,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:07,416 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:07,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6848,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:07,616 INFO L430 AbstractCegarLoop]: === Iteration 837 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -271028762, now seen corresponding path program 670 times [2021-06-05 22:11:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:07,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192067410] [2021-06-05 22:11:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:07,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:07,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192067410] [2021-06-05 22:11:07,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192067410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:07,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813488542] [2021-06-05 22:11:07,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:07,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:07,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:07,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:07,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:07,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:07,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,905 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2021-06-05 22:11:07,906 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-06-05 22:11:07,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:07,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:07,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:07,927 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:07,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:07,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 22:11:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:07,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813488542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:07,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:07,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957044707] [2021-06-05 22:11:07,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:07,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:07,967 INFO L87 Difference]: Start difference. First operand 738 states and 2493 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:08,232 INFO L93 Difference]: Finished difference Result 1279 states and 3936 transitions. [2021-06-05 22:11:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:08,234 INFO L225 Difference]: With dead ends: 1279 [2021-06-05 22:11:08,234 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 22:11:08,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:11:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 22:11:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 724. [2021-06-05 22:11:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 3.38865836791148) internal successors, (2450), 723 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2450 transitions. [2021-06-05 22:11:08,244 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2450 transitions. Word has length 20 [2021-06-05 22:11:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:08,244 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 2450 transitions. [2021-06-05 22:11:08,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2450 transitions. [2021-06-05 22:11:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:08,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:08,244 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:08,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6861 [2021-06-05 22:11:08,445 INFO L430 AbstractCegarLoop]: === Iteration 838 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1738942430, now seen corresponding path program 671 times [2021-06-05 22:11:08,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:08,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510165615] [2021-06-05 22:11:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:08,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:08,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510165615] [2021-06-05 22:11:08,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510165615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:08,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353182580] [2021-06-05 22:11:08,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:08,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:08,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:08,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:08,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353182580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:08,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:08,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:08,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981619604] [2021-06-05 22:11:08,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:08,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:08,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:08,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:08,708 INFO L87 Difference]: Start difference. First operand 724 states and 2450 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:08,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:08,949 INFO L93 Difference]: Finished difference Result 1168 states and 3627 transitions. [2021-06-05 22:11:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:08,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:08,950 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 22:11:08,950 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 22:11:08,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 22:11:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 745. [2021-06-05 22:11:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3911290322580645) internal successors, (2523), 744 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2523 transitions. [2021-06-05 22:11:08,959 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2523 transitions. Word has length 20 [2021-06-05 22:11:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:08,959 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 2523 transitions. [2021-06-05 22:11:08,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2523 transitions. [2021-06-05 22:11:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:08,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:08,960 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:09,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6873 [2021-06-05 22:11:09,161 INFO L430 AbstractCegarLoop]: === Iteration 839 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1061612628, now seen corresponding path program 672 times [2021-06-05 22:11:09,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:09,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898209796] [2021-06-05 22:11:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:09,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:09,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898209796] [2021-06-05 22:11:09,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898209796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:09,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754730463] [2021-06-05 22:11:09,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:09,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:09,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:09,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754730463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:09,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:09,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:09,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097837275] [2021-06-05 22:11:09,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:09,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:09,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:09,474 INFO L87 Difference]: Start difference. First operand 745 states and 2523 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:09,886 INFO L93 Difference]: Finished difference Result 1171 states and 3586 transitions. [2021-06-05 22:11:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:09,886 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:09,887 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 22:11:09,887 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 22:11:09,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 22:11:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 745. [2021-06-05 22:11:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3911290322580645) internal successors, (2523), 744 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2523 transitions. [2021-06-05 22:11:09,897 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2523 transitions. Word has length 20 [2021-06-05 22:11:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:09,897 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 2523 transitions. [2021-06-05 22:11:09,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2523 transitions. [2021-06-05 22:11:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:09,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:09,897 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:10,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6880 [2021-06-05 22:11:10,098 INFO L430 AbstractCegarLoop]: === Iteration 840 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1739446946, now seen corresponding path program 673 times [2021-06-05 22:11:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:10,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752427989] [2021-06-05 22:11:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:10,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:10,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752427989] [2021-06-05 22:11:10,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752427989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:10,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251984550] [2021-06-05 22:11:10,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:10,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:10,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:10,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251984550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:10,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:10,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:10,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223359977] [2021-06-05 22:11:10,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:10,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:10,396 INFO L87 Difference]: Start difference. First operand 745 states and 2523 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:10,816 INFO L93 Difference]: Finished difference Result 1046 states and 3278 transitions. [2021-06-05 22:11:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:10,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:10,817 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 22:11:10,817 INFO L226 Difference]: Without dead ends: 1040 [2021-06-05 22:11:10,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-06-05 22:11:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 745. [2021-06-05 22:11:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3870967741935485) internal successors, (2520), 744 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2520 transitions. [2021-06-05 22:11:10,826 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2520 transitions. Word has length 20 [2021-06-05 22:11:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:10,826 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 2520 transitions. [2021-06-05 22:11:10,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2520 transitions. [2021-06-05 22:11:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:10,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:10,826 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:11,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6888,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:11,027 INFO L430 AbstractCegarLoop]: === Iteration 841 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:11,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:11,027 INFO L82 PathProgramCache]: Analyzing trace with hash 298504112, now seen corresponding path program 674 times [2021-06-05 22:11:11,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:11,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712856512] [2021-06-05 22:11:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:11,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:11,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712856512] [2021-06-05 22:11:11,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712856512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:11,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695212149] [2021-06-05 22:11:11,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:11,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:11,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:11,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695212149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:11,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:11,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:11,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026413893] [2021-06-05 22:11:11,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:11,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:11,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:11,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:11,292 INFO L87 Difference]: Start difference. First operand 745 states and 2520 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:11,582 INFO L93 Difference]: Finished difference Result 1111 states and 3492 transitions. [2021-06-05 22:11:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:11,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:11,584 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 22:11:11,584 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:11:11,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:11:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 742. [2021-06-05 22:11:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.390013495276653) internal successors, (2512), 741 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2512 transitions. [2021-06-05 22:11:11,593 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2512 transitions. Word has length 20 [2021-06-05 22:11:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:11,593 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2512 transitions. [2021-06-05 22:11:11,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2512 transitions. [2021-06-05 22:11:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:11,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:11,594 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:11,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6898,703 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:11,794 INFO L430 AbstractCegarLoop]: === Iteration 842 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2017664772, now seen corresponding path program 675 times [2021-06-05 22:11:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:11,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271442415] [2021-06-05 22:11:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:11,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:11,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271442415] [2021-06-05 22:11:11,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271442415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:11,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8942413] [2021-06-05 22:11:11,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:11,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:11:11,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:11,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:11,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:12,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8942413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:12,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:12,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:12,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779275794] [2021-06-05 22:11:12,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:12,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:12,113 INFO L87 Difference]: Start difference. First operand 742 states and 2512 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:12,571 INFO L93 Difference]: Finished difference Result 1010 states and 3196 transitions. [2021-06-05 22:11:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:12,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:12,573 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 22:11:12,573 INFO L226 Difference]: Without dead ends: 998 [2021-06-05 22:11:12,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-05 22:11:12,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 742. [2021-06-05 22:11:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3859649122807016) internal successors, (2509), 741 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2509 transitions. [2021-06-05 22:11:12,581 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2509 transitions. Word has length 20 [2021-06-05 22:11:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:12,581 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2509 transitions. [2021-06-05 22:11:12,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2509 transitions. [2021-06-05 22:11:12,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:12,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:12,582 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:12,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6906,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:12,782 INFO L430 AbstractCegarLoop]: === Iteration 843 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:12,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1847666648, now seen corresponding path program 676 times [2021-06-05 22:11:12,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:12,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917733393] [2021-06-05 22:11:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:12,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:12,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917733393] [2021-06-05 22:11:12,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917733393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:12,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761470710] [2021-06-05 22:11:12,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:12,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:12,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:13,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761470710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:13,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:13,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:13,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175832773] [2021-06-05 22:11:13,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:13,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:13,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:13,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:13,040 INFO L87 Difference]: Start difference. First operand 742 states and 2509 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:13,306 INFO L93 Difference]: Finished difference Result 1067 states and 3390 transitions. [2021-06-05 22:11:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:11:13,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:13,308 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 22:11:13,308 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 22:11:13,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:11:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 22:11:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 739. [2021-06-05 22:11:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.388888888888889) internal successors, (2501), 738 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2501 transitions. [2021-06-05 22:11:13,317 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2501 transitions. Word has length 20 [2021-06-05 22:11:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:13,317 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2501 transitions. [2021-06-05 22:11:13,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2501 transitions. [2021-06-05 22:11:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:13,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:13,318 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:13,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6916 [2021-06-05 22:11:13,518 INFO L430 AbstractCegarLoop]: === Iteration 844 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash -737447768, now seen corresponding path program 677 times [2021-06-05 22:11:13,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:13,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037969066] [2021-06-05 22:11:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:13,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:13,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037969066] [2021-06-05 22:11:13,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037969066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:13,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462659746] [2021-06-05 22:11:13,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:13,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:13,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:13,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:13,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:13,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462659746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:13,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:13,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:13,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765909909] [2021-06-05 22:11:13,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:13,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:13,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:13,792 INFO L87 Difference]: Start difference. First operand 739 states and 2501 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:14,031 INFO L93 Difference]: Finished difference Result 1284 states and 3901 transitions. [2021-06-05 22:11:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:14,033 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 22:11:14,033 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 22:11:14,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 22:11:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 747. [2021-06-05 22:11:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.4021447721179623) internal successors, (2538), 746 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2538 transitions. [2021-06-05 22:11:14,042 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2538 transitions. Word has length 20 [2021-06-05 22:11:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:14,043 INFO L482 AbstractCegarLoop]: Abstraction has 747 states and 2538 transitions. [2021-06-05 22:11:14,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2538 transitions. [2021-06-05 22:11:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:14,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:14,043 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:14,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6921,706 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:14,244 INFO L430 AbstractCegarLoop]: === Iteration 845 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:14,244 INFO L82 PathProgramCache]: Analyzing trace with hash 756964470, now seen corresponding path program 678 times [2021-06-05 22:11:14,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:14,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483772265] [2021-06-05 22:11:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:14,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:14,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483772265] [2021-06-05 22:11:14,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483772265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:14,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008956306] [2021-06-05 22:11:14,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:14,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:14,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:14,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:14,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:14,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008956306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:14,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:14,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:14,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597182951] [2021-06-05 22:11:14,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:14,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:14,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:14,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:14,563 INFO L87 Difference]: Start difference. First operand 747 states and 2538 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:15,050 INFO L93 Difference]: Finished difference Result 1421 states and 4208 transitions. [2021-06-05 22:11:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:11:15,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:15,051 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 22:11:15,051 INFO L226 Difference]: Without dead ends: 1421 [2021-06-05 22:11:15,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:11:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-06-05 22:11:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 751. [2021-06-05 22:11:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.4106666666666667) internal successors, (2558), 750 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2558 transitions. [2021-06-05 22:11:15,062 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2558 transitions. Word has length 20 [2021-06-05 22:11:15,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:15,062 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2558 transitions. [2021-06-05 22:11:15,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2558 transitions. [2021-06-05 22:11:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:15,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:15,063 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:15,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6929 [2021-06-05 22:11:15,263 INFO L430 AbstractCegarLoop]: === Iteration 846 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash -736943252, now seen corresponding path program 679 times [2021-06-05 22:11:15,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:15,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607094418] [2021-06-05 22:11:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:15,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:15,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607094418] [2021-06-05 22:11:15,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607094418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:15,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092281441] [2021-06-05 22:11:15,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:15,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:15,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092281441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:15,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:15,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:15,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122522624] [2021-06-05 22:11:15,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:15,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:15,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:15,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:15,567 INFO L87 Difference]: Start difference. First operand 751 states and 2558 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:16,006 INFO L93 Difference]: Finished difference Result 1147 states and 3538 transitions. [2021-06-05 22:11:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:11:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:16,008 INFO L225 Difference]: With dead ends: 1147 [2021-06-05 22:11:16,008 INFO L226 Difference]: Without dead ends: 1141 [2021-06-05 22:11:16,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:11:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-06-05 22:11:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 757. [2021-06-05 22:11:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.3968253968253967) internal successors, (2568), 756 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2568 transitions. [2021-06-05 22:11:16,018 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2568 transitions. Word has length 20 [2021-06-05 22:11:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:16,018 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2568 transitions. [2021-06-05 22:11:16,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:16,018 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2568 transitions. [2021-06-05 22:11:16,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:16,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:16,018 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:16,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6938,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:16,219 INFO L430 AbstractCegarLoop]: === Iteration 847 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:16,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2117081210, now seen corresponding path program 680 times [2021-06-05 22:11:16,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:16,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546337768] [2021-06-05 22:11:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:16,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:16,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546337768] [2021-06-05 22:11:16,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546337768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:16,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270505879] [2021-06-05 22:11:16,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:16,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:16,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:16,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:16,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:16,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270505879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:16,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:16,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:16,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493872932] [2021-06-05 22:11:16,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:16,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:16,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:16,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:16,490 INFO L87 Difference]: Start difference. First operand 757 states and 2568 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:16,923 INFO L93 Difference]: Finished difference Result 1319 states and 3967 transitions. [2021-06-05 22:11:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:11:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:16,924 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 22:11:16,924 INFO L226 Difference]: Without dead ends: 1319 [2021-06-05 22:11:16,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 376.6ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:11:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-06-05 22:11:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 751. [2021-06-05 22:11:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3946666666666667) internal successors, (2546), 750 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2546 transitions. [2021-06-05 22:11:16,934 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2546 transitions. Word has length 20 [2021-06-05 22:11:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:16,934 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2546 transitions. [2021-06-05 22:11:16,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2546 transitions. [2021-06-05 22:11:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:16,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:16,935 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:17,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6951,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:17,136 INFO L430 AbstractCegarLoop]: === Iteration 848 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1922584512, now seen corresponding path program 681 times [2021-06-05 22:11:17,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:17,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566572374] [2021-06-05 22:11:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:17,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566572374] [2021-06-05 22:11:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566572374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940639109] [2021-06-05 22:11:17,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:17,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:17,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:17,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940639109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:17,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:17,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:17,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124206967] [2021-06-05 22:11:17,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:17,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:17,390 INFO L87 Difference]: Start difference. First operand 751 states and 2546 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:17,623 INFO L93 Difference]: Finished difference Result 1198 states and 3700 transitions. [2021-06-05 22:11:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:17,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:17,625 INFO L225 Difference]: With dead ends: 1198 [2021-06-05 22:11:17,625 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 22:11:17,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 22:11:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 755. [2021-06-05 22:11:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.3952254641909816) internal successors, (2560), 754 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2560 transitions. [2021-06-05 22:11:17,634 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2560 transitions. Word has length 20 [2021-06-05 22:11:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:17,634 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2560 transitions. [2021-06-05 22:11:17,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2560 transitions. [2021-06-05 22:11:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:17,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:17,635 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:17,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6958,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:17,836 INFO L430 AbstractCegarLoop]: === Iteration 849 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash 445318312, now seen corresponding path program 682 times [2021-06-05 22:11:17,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:17,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215095255] [2021-06-05 22:11:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:17,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215095255] [2021-06-05 22:11:17,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215095255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19113805] [2021-06-05 22:11:17,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:18,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:18,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:18,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19113805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:18,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:18,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:18,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028585834] [2021-06-05 22:11:18,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:18,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:18,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:18,120 INFO L87 Difference]: Start difference. First operand 755 states and 2560 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:18,419 INFO L93 Difference]: Finished difference Result 1179 states and 3679 transitions. [2021-06-05 22:11:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:18,421 INFO L225 Difference]: With dead ends: 1179 [2021-06-05 22:11:18,421 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 22:11:18,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 22:11:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 753. [2021-06-05 22:11:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3976063829787235) internal successors, (2555), 752 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2555 transitions. [2021-06-05 22:11:18,431 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2555 transitions. Word has length 20 [2021-06-05 22:11:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:18,431 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2555 transitions. [2021-06-05 22:11:18,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2555 transitions. [2021-06-05 22:11:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:18,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:18,432 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:18,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6965,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:18,637 INFO L430 AbstractCegarLoop]: === Iteration 850 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1508364908, now seen corresponding path program 683 times [2021-06-05 22:11:18,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:18,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189400966] [2021-06-05 22:11:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:18,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:18,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189400966] [2021-06-05 22:11:18,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189400966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:18,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549007624] [2021-06-05 22:11:18,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:18,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:18,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:18,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:18,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549007624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:18,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:18,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:18,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961475666] [2021-06-05 22:11:18,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:18,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:18,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:18,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:18,947 INFO L87 Difference]: Start difference. First operand 753 states and 2555 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:19,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:19,373 INFO L93 Difference]: Finished difference Result 1288 states and 3887 transitions. [2021-06-05 22:11:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:19,375 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 22:11:19,375 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 22:11:19,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 22:11:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 744. [2021-06-05 22:11:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.4024226110363394) internal successors, (2528), 743 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2528 transitions. [2021-06-05 22:11:19,384 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2528 transitions. Word has length 20 [2021-06-05 22:11:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:19,384 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2528 transitions. [2021-06-05 22:11:19,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2528 transitions. [2021-06-05 22:11:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:19,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:19,385 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:19,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6973 [2021-06-05 22:11:19,586 INFO L430 AbstractCegarLoop]: === Iteration 851 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1494259988, now seen corresponding path program 684 times [2021-06-05 22:11:19,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:19,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217516547] [2021-06-05 22:11:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:19,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217516547] [2021-06-05 22:11:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217516547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741884986] [2021-06-05 22:11:19,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:19,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:19,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741884986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:19,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:19,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:19,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613079247] [2021-06-05 22:11:19,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:19,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:19,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:19,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:19,898 INFO L87 Difference]: Start difference. First operand 744 states and 2528 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:20,306 INFO L93 Difference]: Finished difference Result 1251 states and 3805 transitions. [2021-06-05 22:11:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:20,308 INFO L225 Difference]: With dead ends: 1251 [2021-06-05 22:11:20,308 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 22:11:20,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 22:11:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 743. [2021-06-05 22:11:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.398921832884097) internal successors, (2522), 742 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2522 transitions. [2021-06-05 22:11:20,317 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2522 transitions. Word has length 20 [2021-06-05 22:11:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:20,318 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2522 transitions. [2021-06-05 22:11:20,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2522 transitions. [2021-06-05 22:11:20,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:20,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:20,318 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:20,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 713 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6983 [2021-06-05 22:11:20,519 INFO L430 AbstractCegarLoop]: === Iteration 852 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1529101436, now seen corresponding path program 685 times [2021-06-05 22:11:20,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:20,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445045470] [2021-06-05 22:11:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:20,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:20,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445045470] [2021-06-05 22:11:20,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445045470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:20,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284408894] [2021-06-05 22:11:20,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:20,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284408894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:20,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:20,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:20,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586974454] [2021-06-05 22:11:20,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:20,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:20,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:20,823 INFO L87 Difference]: Start difference. First operand 743 states and 2522 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:21,272 INFO L93 Difference]: Finished difference Result 1120 states and 3473 transitions. [2021-06-05 22:11:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:11:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:21,273 INFO L225 Difference]: With dead ends: 1120 [2021-06-05 22:11:21,274 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 22:11:21,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:11:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 22:11:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 753. [2021-06-05 22:11:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.389627659574468) internal successors, (2549), 752 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2549 transitions. [2021-06-05 22:11:21,282 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2549 transitions. Word has length 20 [2021-06-05 22:11:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:21,283 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2549 transitions. [2021-06-05 22:11:21,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2549 transitions. [2021-06-05 22:11:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:21,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:21,283 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:21,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6995,714 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:21,484 INFO L430 AbstractCegarLoop]: === Iteration 853 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash -386322490, now seen corresponding path program 686 times [2021-06-05 22:11:21,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:21,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593502185] [2021-06-05 22:11:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:21,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:21,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593502185] [2021-06-05 22:11:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593502185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231988966] [2021-06-05 22:11:21,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:21,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:21,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:21,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231988966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:21,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:21,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:21,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462667337] [2021-06-05 22:11:21,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:21,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:21,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:21,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:21,805 INFO L87 Difference]: Start difference. First operand 753 states and 2549 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:22,227 INFO L93 Difference]: Finished difference Result 1275 states and 3864 transitions. [2021-06-05 22:11:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:22,230 INFO L225 Difference]: With dead ends: 1275 [2021-06-05 22:11:22,230 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 22:11:22,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 22:11:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 743. [2021-06-05 22:11:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.398921832884097) internal successors, (2522), 742 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2522 transitions. [2021-06-05 22:11:22,239 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2522 transitions. Word has length 20 [2021-06-05 22:11:22,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:22,239 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2522 transitions. [2021-06-05 22:11:22,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2522 transitions. [2021-06-05 22:11:22,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:22,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:22,240 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:22,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7010,715 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:22,441 INFO L430 AbstractCegarLoop]: === Iteration 854 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:22,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2024695784, now seen corresponding path program 687 times [2021-06-05 22:11:22,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:22,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401108531] [2021-06-05 22:11:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:22,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:22,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401108531] [2021-06-05 22:11:22,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401108531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:22,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212663002] [2021-06-05 22:11:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:22,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:22,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:22,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:22,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212663002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:22,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:22,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:22,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792977589] [2021-06-05 22:11:22,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:22,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:22,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:22,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:22,723 INFO L87 Difference]: Start difference. First operand 743 states and 2522 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:23,022 INFO L93 Difference]: Finished difference Result 1231 states and 3800 transitions. [2021-06-05 22:11:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:23,023 INFO L225 Difference]: With dead ends: 1231 [2021-06-05 22:11:23,023 INFO L226 Difference]: Without dead ends: 1231 [2021-06-05 22:11:23,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-06-05 22:11:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 746. [2021-06-05 22:11:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.4053691275167783) internal successors, (2537), 745 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2537 transitions. [2021-06-05 22:11:23,033 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2537 transitions. Word has length 20 [2021-06-05 22:11:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:23,033 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 2537 transitions. [2021-06-05 22:11:23,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2537 transitions. [2021-06-05 22:11:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:23,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:23,034 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:23,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 716 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7021 [2021-06-05 22:11:23,234 INFO L430 AbstractCegarLoop]: === Iteration 855 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:23,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:23,234 INFO L82 PathProgramCache]: Analyzing trace with hash -645933744, now seen corresponding path program 688 times [2021-06-05 22:11:23,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:23,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21589853] [2021-06-05 22:11:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:23,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:23,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21589853] [2021-06-05 22:11:23,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21589853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:23,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945013404] [2021-06-05 22:11:23,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:23,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:23,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:23,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:23,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945013404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:23,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:23,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:23,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46458337] [2021-06-05 22:11:23,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:23,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:23,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:23,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:23,491 INFO L87 Difference]: Start difference. First operand 746 states and 2537 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:23,763 INFO L93 Difference]: Finished difference Result 1195 states and 3720 transitions. [2021-06-05 22:11:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:23,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:23,765 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 22:11:23,765 INFO L226 Difference]: Without dead ends: 1195 [2021-06-05 22:11:23,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:11:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-05 22:11:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 742. [2021-06-05 22:11:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.395411605937922) internal successors, (2516), 741 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2516 transitions. [2021-06-05 22:11:23,774 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2516 transitions. Word has length 20 [2021-06-05 22:11:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:23,774 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2516 transitions. [2021-06-05 22:11:23,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2516 transitions. [2021-06-05 22:11:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:23,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:23,775 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:23,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7030,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:23,975 INFO L430 AbstractCegarLoop]: === Iteration 856 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash -489756180, now seen corresponding path program 689 times [2021-06-05 22:11:23,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:23,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109630183] [2021-06-05 22:11:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:24,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:24,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109630183] [2021-06-05 22:11:24,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109630183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:24,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095071663] [2021-06-05 22:11:24,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:24,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:24,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:24,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:24,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095071663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:24,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:24,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:24,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769937594] [2021-06-05 22:11:24,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:24,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:24,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:24,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:24,284 INFO L87 Difference]: Start difference. First operand 742 states and 2516 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:24,805 INFO L93 Difference]: Finished difference Result 1019 states and 3225 transitions. [2021-06-05 22:11:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:24,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:24,806 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 22:11:24,806 INFO L226 Difference]: Without dead ends: 1007 [2021-06-05 22:11:24,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 484.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-06-05 22:11:24,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 744. [2021-06-05 22:11:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.3956931359353972) internal successors, (2523), 743 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2523 transitions. [2021-06-05 22:11:24,815 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2523 transitions. Word has length 20 [2021-06-05 22:11:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:24,815 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2523 transitions. [2021-06-05 22:11:24,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2523 transitions. [2021-06-05 22:11:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:24,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:24,816 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:25,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7039,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:25,016 INFO L430 AbstractCegarLoop]: === Iteration 857 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:25,016 INFO L82 PathProgramCache]: Analyzing trace with hash 261644258, now seen corresponding path program 690 times [2021-06-05 22:11:25,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:25,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915159088] [2021-06-05 22:11:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:25,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:25,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915159088] [2021-06-05 22:11:25,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915159088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:25,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043061042] [2021-06-05 22:11:25,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:25,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:11:25,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:25,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:25,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043061042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:25,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:25,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:25,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679428490] [2021-06-05 22:11:25,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:25,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:25,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:25,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:25,333 INFO L87 Difference]: Start difference. First operand 744 states and 2523 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:25,874 INFO L93 Difference]: Finished difference Result 1064 states and 3327 transitions. [2021-06-05 22:11:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:11:25,874 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:25,875 INFO L225 Difference]: With dead ends: 1064 [2021-06-05 22:11:25,875 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 22:11:25,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:11:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 22:11:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 754. [2021-06-05 22:11:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3864541832669324) internal successors, (2550), 753 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2550 transitions. [2021-06-05 22:11:25,884 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2550 transitions. Word has length 20 [2021-06-05 22:11:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:25,884 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2550 transitions. [2021-06-05 22:11:25,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2550 transitions. [2021-06-05 22:11:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:25,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:25,885 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:26,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7048 [2021-06-05 22:11:26,085 INFO L430 AbstractCegarLoop]: === Iteration 858 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1653779668, now seen corresponding path program 691 times [2021-06-05 22:11:26,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:26,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197274989] [2021-06-05 22:11:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:26,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:26,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197274989] [2021-06-05 22:11:26,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197274989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:26,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502250472] [2021-06-05 22:11:26,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:26,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:26,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:26,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502250472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:26,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:26,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:26,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099821069] [2021-06-05 22:11:26,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:26,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:26,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:26,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:26,395 INFO L87 Difference]: Start difference. First operand 754 states and 2550 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:26,895 INFO L93 Difference]: Finished difference Result 1217 states and 3711 transitions. [2021-06-05 22:11:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:11:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:26,896 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 22:11:26,896 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 22:11:26,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 22:11:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 742. [2021-06-05 22:11:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.395411605937922) internal successors, (2516), 741 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2516 transitions. [2021-06-05 22:11:26,906 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2516 transitions. Word has length 20 [2021-06-05 22:11:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:26,906 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2516 transitions. [2021-06-05 22:11:26,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2516 transitions. [2021-06-05 22:11:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:26,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:26,906 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:27,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7061,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:27,107 INFO L430 AbstractCegarLoop]: === Iteration 859 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash -416647558, now seen corresponding path program 692 times [2021-06-05 22:11:27,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:27,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106104833] [2021-06-05 22:11:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:27,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:27,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106104833] [2021-06-05 22:11:27,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106104833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:27,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071475033] [2021-06-05 22:11:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:27,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:27,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:27,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071475033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:27,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:27,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:27,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309735685] [2021-06-05 22:11:27,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:27,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:27,363 INFO L87 Difference]: Start difference. First operand 742 states and 2516 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:27,680 INFO L93 Difference]: Finished difference Result 1111 states and 3520 transitions. [2021-06-05 22:11:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:27,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:27,681 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 22:11:27,681 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 22:11:27,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 22:11:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 745. [2021-06-05 22:11:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.4018817204301075) internal successors, (2531), 744 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2531 transitions. [2021-06-05 22:11:27,690 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2531 transitions. Word has length 20 [2021-06-05 22:11:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:27,691 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 2531 transitions. [2021-06-05 22:11:27,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2531 transitions. [2021-06-05 22:11:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:27,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:27,691 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:27,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7072 [2021-06-05 22:11:27,892 INFO L430 AbstractCegarLoop]: === Iteration 860 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:27,892 INFO L82 PathProgramCache]: Analyzing trace with hash 334752880, now seen corresponding path program 693 times [2021-06-05 22:11:27,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:27,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026027653] [2021-06-05 22:11:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:27,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:27,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026027653] [2021-06-05 22:11:27,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026027653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:27,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8920867] [2021-06-05 22:11:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:28,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:28,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:28,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8920867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:28,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:28,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:28,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722307172] [2021-06-05 22:11:28,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:28,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:28,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:28,172 INFO L87 Difference]: Start difference. First operand 745 states and 2531 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:28,445 INFO L93 Difference]: Finished difference Result 1144 states and 3603 transitions. [2021-06-05 22:11:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:28,447 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 22:11:28,447 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 22:11:28,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 22:11:28,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 748. [2021-06-05 22:11:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.4082998661311916) internal successors, (2546), 747 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2546 transitions. [2021-06-05 22:11:28,456 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2546 transitions. Word has length 20 [2021-06-05 22:11:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:28,456 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2546 transitions. [2021-06-05 22:11:28,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2546 transitions. [2021-06-05 22:11:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:28,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:28,457 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:28,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7076,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:28,657 INFO L430 AbstractCegarLoop]: === Iteration 861 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:28,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1959090648, now seen corresponding path program 694 times [2021-06-05 22:11:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:28,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489910809] [2021-06-05 22:11:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:28,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:28,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489910809] [2021-06-05 22:11:28,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489910809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:28,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022446136] [2021-06-05 22:11:28,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:28,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:28,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:28,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022446136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:28,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:28,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:28,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349874237] [2021-06-05 22:11:28,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:28,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:28,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:28,926 INFO L87 Difference]: Start difference. First operand 748 states and 2546 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:29,183 INFO L93 Difference]: Finished difference Result 1102 states and 3508 transitions. [2021-06-05 22:11:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:29,185 INFO L225 Difference]: With dead ends: 1102 [2021-06-05 22:11:29,185 INFO L226 Difference]: Without dead ends: 1102 [2021-06-05 22:11:29,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-06-05 22:11:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 741. [2021-06-05 22:11:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.391891891891892) internal successors, (2510), 740 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2510 transitions. [2021-06-05 22:11:29,194 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2510 transitions. Word has length 20 [2021-06-05 22:11:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:29,194 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2510 transitions. [2021-06-05 22:11:29,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2510 transitions. [2021-06-05 22:11:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:29,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:29,195 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:29,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7083,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:29,395 INFO L430 AbstractCegarLoop]: === Iteration 862 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash -2010381476, now seen corresponding path program 695 times [2021-06-05 22:11:29,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:29,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862950783] [2021-06-05 22:11:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:29,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:29,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862950783] [2021-06-05 22:11:29,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862950783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:29,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637325581] [2021-06-05 22:11:29,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:29,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:29,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:29,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:29,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:29,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:11:29,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:29,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:29,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,663 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:11:29,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:29,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:29,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,684 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:29,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:29,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:29,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637325581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:29,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:29,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:29,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72430818] [2021-06-05 22:11:29,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:29,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:29,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:29,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:29,742 INFO L87 Difference]: Start difference. First operand 741 states and 2510 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:29,969 INFO L93 Difference]: Finished difference Result 1363 states and 4169 transitions. [2021-06-05 22:11:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:11:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:29,971 INFO L225 Difference]: With dead ends: 1363 [2021-06-05 22:11:29,971 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 22:11:29,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 22:11:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 749. [2021-06-05 22:11:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.4037433155080214) internal successors, (2546), 748 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2546 transitions. [2021-06-05 22:11:29,982 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2546 transitions. Word has length 20 [2021-06-05 22:11:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:29,982 INFO L482 AbstractCegarLoop]: Abstraction has 749 states and 2546 transitions. [2021-06-05 22:11:29,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2546 transitions. [2021-06-05 22:11:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:29,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:29,983 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:30,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7089 [2021-06-05 22:11:30,183 INFO L430 AbstractCegarLoop]: === Iteration 863 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash -515969238, now seen corresponding path program 696 times [2021-06-05 22:11:30,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:30,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716795193] [2021-06-05 22:11:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:30,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:30,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716795193] [2021-06-05 22:11:30,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716795193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:30,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44578727] [2021-06-05 22:11:30,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:30,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:30,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:30,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:30,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:30,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:30,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:30,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:30,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:30,458 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-06-05 22:11:30,458 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-06-05 22:11:30,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:30,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:30,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:30,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:30,485 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:30,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:30,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:20 [2021-06-05 22:11:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:30,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44578727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:30,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:30,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:30,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968240850] [2021-06-05 22:11:30,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:30,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:30,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:30,546 INFO L87 Difference]: Start difference. First operand 749 states and 2546 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:31,012 INFO L93 Difference]: Finished difference Result 1506 states and 4504 transitions. [2021-06-05 22:11:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:11:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:31,014 INFO L225 Difference]: With dead ends: 1506 [2021-06-05 22:11:31,014 INFO L226 Difference]: Without dead ends: 1506 [2021-06-05 22:11:31,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:11:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-06-05 22:11:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 754. [2021-06-05 22:11:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.414342629482072) internal successors, (2571), 753 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2571 transitions. [2021-06-05 22:11:31,025 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2571 transitions. Word has length 20 [2021-06-05 22:11:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:31,025 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2571 transitions. [2021-06-05 22:11:31,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2571 transitions. [2021-06-05 22:11:31,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:31,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:31,026 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:31,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 725 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7100 [2021-06-05 22:11:31,227 INFO L430 AbstractCegarLoop]: === Iteration 864 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2009876960, now seen corresponding path program 697 times [2021-06-05 22:11:31,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:31,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103567974] [2021-06-05 22:11:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:31,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:31,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103567974] [2021-06-05 22:11:31,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103567974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:31,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243234917] [2021-06-05 22:11:31,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:31,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:31,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:31,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:31,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:31,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:31,507 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 22:11:31,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:31,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:31,529 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 22:11:31,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:31,530 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 22:11:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:31,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243234917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:31,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:31,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:31,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865599941] [2021-06-05 22:11:31,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:31,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:31,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:31,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:31,599 INFO L87 Difference]: Start difference. First operand 754 states and 2571 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:31,914 INFO L93 Difference]: Finished difference Result 1232 states and 3834 transitions. [2021-06-05 22:11:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:31,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:31,916 INFO L225 Difference]: With dead ends: 1232 [2021-06-05 22:11:31,916 INFO L226 Difference]: Without dead ends: 1226 [2021-06-05 22:11:31,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-06-05 22:11:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 760. [2021-06-05 22:11:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.4005270092226616) internal successors, (2581), 759 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2581 transitions. [2021-06-05 22:11:31,926 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2581 transitions. Word has length 20 [2021-06-05 22:11:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:31,926 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2581 transitions. [2021-06-05 22:11:31,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2581 transitions. [2021-06-05 22:11:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:31,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:31,927 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:32,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7108,726 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:32,127 INFO L430 AbstractCegarLoop]: === Iteration 865 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash 844147502, now seen corresponding path program 698 times [2021-06-05 22:11:32,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:32,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446098108] [2021-06-05 22:11:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:32,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:32,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446098108] [2021-06-05 22:11:32,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446098108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:32,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018211465] [2021-06-05 22:11:32,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:32,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:32,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:32,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:32,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:32,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:32,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:32,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:32,371 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:11:32,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:32,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:32,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:32,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:32,392 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:32,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018211465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:32,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:32,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:32,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5104943] [2021-06-05 22:11:32,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:32,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:32,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:32,447 INFO L87 Difference]: Start difference. First operand 760 states and 2581 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:32,726 INFO L93 Difference]: Finished difference Result 1297 states and 4039 transitions. [2021-06-05 22:11:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:32,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:32,728 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 22:11:32,728 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 22:11:32,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 22:11:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 754. [2021-06-05 22:11:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.398406374501992) internal successors, (2559), 753 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2559 transitions. [2021-06-05 22:11:32,738 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2559 transitions. Word has length 20 [2021-06-05 22:11:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:32,738 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2559 transitions. [2021-06-05 22:11:32,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:32,738 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2559 transitions. [2021-06-05 22:11:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:32,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:32,739 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:32,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7120,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:32,939 INFO L430 AbstractCegarLoop]: === Iteration 866 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1099449076, now seen corresponding path program 699 times [2021-06-05 22:11:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:32,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062299353] [2021-06-05 22:11:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:32,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062299353] [2021-06-05 22:11:32,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062299353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520137190] [2021-06-05 22:11:32,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:33,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:33,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:33,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 22:11:33,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:33,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:33,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:33,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:33,224 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:11:33,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:33,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:33,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:33,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:33,245 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:33,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:33,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:33,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520137190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:33,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:33,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:33,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353549429] [2021-06-05 22:11:33,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:33,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:33,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:33,304 INFO L87 Difference]: Start difference. First operand 754 states and 2559 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:33,599 INFO L93 Difference]: Finished difference Result 1415 states and 4296 transitions. [2021-06-05 22:11:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:33,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:33,601 INFO L225 Difference]: With dead ends: 1415 [2021-06-05 22:11:33,601 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 22:11:33,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 22:11:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 758. [2021-06-05 22:11:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.3989431968295905) internal successors, (2573), 757 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2573 transitions. [2021-06-05 22:11:33,611 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2573 transitions. Word has length 20 [2021-06-05 22:11:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:33,611 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2573 transitions. [2021-06-05 22:11:33,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2573 transitions. [2021-06-05 22:11:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:33,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:33,612 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:33,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7129,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:33,813 INFO L430 AbstractCegarLoop]: === Iteration 867 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -827615396, now seen corresponding path program 700 times [2021-06-05 22:11:33,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:33,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206250607] [2021-06-05 22:11:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:33,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:33,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206250607] [2021-06-05 22:11:33,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206250607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:33,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199479568] [2021-06-05 22:11:33,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:33,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:34,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:34,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:34,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,050 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 22:11:34,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:34,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:34,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:34,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:34,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199479568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:34,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:34,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:34,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137567928] [2021-06-05 22:11:34,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:34,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:34,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:34,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:34,114 INFO L87 Difference]: Start difference. First operand 758 states and 2573 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:34,490 INFO L93 Difference]: Finished difference Result 1425 states and 4335 transitions. [2021-06-05 22:11:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:11:34,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:34,492 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 22:11:34,492 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 22:11:34,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 22:11:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 754. [2021-06-05 22:11:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.398406374501992) internal successors, (2559), 753 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2559 transitions. [2021-06-05 22:11:34,503 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2559 transitions. Word has length 20 [2021-06-05 22:11:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:34,503 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2559 transitions. [2021-06-05 22:11:34,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2559 transitions. [2021-06-05 22:11:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:34,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:34,504 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:34,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7140,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:34,704 INFO L430 AbstractCegarLoop]: === Iteration 868 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 235431200, now seen corresponding path program 701 times [2021-06-05 22:11:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:34,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319361704] [2021-06-05 22:11:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:34,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:34,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319361704] [2021-06-05 22:11:34,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319361704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:34,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114639024] [2021-06-05 22:11:34,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:34,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:34,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:34,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,987 INFO L628 ElimStorePlain]: treesize reduction 45, result has 47.1 percent of original size [2021-06-05 22:11:34,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:34,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:34,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:35,010 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:35,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:35,011 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:20 [2021-06-05 22:11:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:35,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114639024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:35,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:35,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:35,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520165195] [2021-06-05 22:11:35,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:35,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:35,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:35,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:35,069 INFO L87 Difference]: Start difference. First operand 754 states and 2559 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:35,582 INFO L93 Difference]: Finished difference Result 1563 states and 4638 transitions. [2021-06-05 22:11:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:11:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:35,584 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 22:11:35,584 INFO L226 Difference]: Without dead ends: 1563 [2021-06-05 22:11:35,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:11:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2021-06-05 22:11:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 755. [2021-06-05 22:11:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.4018567639257293) internal successors, (2565), 754 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2565 transitions. [2021-06-05 22:11:35,595 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2565 transitions. Word has length 20 [2021-06-05 22:11:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:35,595 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2565 transitions. [2021-06-05 22:11:35,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2565 transitions. [2021-06-05 22:11:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:35,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:35,596 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:35,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7151,730 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:35,796 INFO L430 AbstractCegarLoop]: === Iteration 869 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1527773600, now seen corresponding path program 702 times [2021-06-05 22:11:35,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:35,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687205984] [2021-06-05 22:11:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:35,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:35,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687205984] [2021-06-05 22:11:35,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687205984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:35,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379100076] [2021-06-05 22:11:35,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:35,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:36,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:36,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:36,073 INFO L628 ElimStorePlain]: treesize reduction 10, result has 80.0 percent of original size [2021-06-05 22:11:36,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:36,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:36,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:36,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:36,094 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:36,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:36,095 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 22:11:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:36,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379100076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:36,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:36,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:36,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994313221] [2021-06-05 22:11:36,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:36,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:36,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:36,155 INFO L87 Difference]: Start difference. First operand 755 states and 2565 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:36,637 INFO L93 Difference]: Finished difference Result 1526 states and 4556 transitions. [2021-06-05 22:11:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:11:36,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:36,639 INFO L225 Difference]: With dead ends: 1526 [2021-06-05 22:11:36,639 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 22:11:36,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 460.3ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:11:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 22:11:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 754. [2021-06-05 22:11:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.398406374501992) internal successors, (2559), 753 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2559 transitions. [2021-06-05 22:11:36,650 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2559 transitions. Word has length 20 [2021-06-05 22:11:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:36,650 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2559 transitions. [2021-06-05 22:11:36,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2559 transitions. [2021-06-05 22:11:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:36,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:36,650 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:36,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7163 [2021-06-05 22:11:36,851 INFO L430 AbstractCegarLoop]: === Iteration 870 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:36,851 INFO L82 PathProgramCache]: Analyzing trace with hash 256167728, now seen corresponding path program 703 times [2021-06-05 22:11:36,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:36,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694555848] [2021-06-05 22:11:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:36,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694555848] [2021-06-05 22:11:36,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694555848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445053413] [2021-06-05 22:11:36,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:37,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:37,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:37,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,156 INFO L628 ElimStorePlain]: treesize reduction 14, result has 79.4 percent of original size [2021-06-05 22:11:37,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:37,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,195 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-06-05 22:11:37,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:37,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:37,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:37,216 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:37,216 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:37,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:37,217 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:79, output treesize:20 [2021-06-05 22:11:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:37,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445053413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:37,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:37,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:37,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681702372] [2021-06-05 22:11:37,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:37,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:37,284 INFO L87 Difference]: Start difference. First operand 754 states and 2559 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:37,664 INFO L93 Difference]: Finished difference Result 1283 states and 3949 transitions. [2021-06-05 22:11:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:11:37,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:37,666 INFO L225 Difference]: With dead ends: 1283 [2021-06-05 22:11:37,666 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 22:11:37,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:11:37,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 22:11:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 758. [2021-06-05 22:11:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.3989431968295905) internal successors, (2573), 757 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2573 transitions. [2021-06-05 22:11:37,676 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2573 transitions. Word has length 20 [2021-06-05 22:11:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:37,676 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2573 transitions. [2021-06-05 22:11:37,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2573 transitions. [2021-06-05 22:11:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:37,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:37,677 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:37,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 732 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7174 [2021-06-05 22:11:37,878 INFO L430 AbstractCegarLoop]: === Iteration 871 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1659256198, now seen corresponding path program 704 times [2021-06-05 22:11:37,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:37,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742924434] [2021-06-05 22:11:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:37,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:37,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742924434] [2021-06-05 22:11:37,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742924434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:37,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307404346] [2021-06-05 22:11:37,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:38,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:38,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:38,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:38,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:38,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:38,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:38,150 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-06-05 22:11:38,151 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-06-05 22:11:38,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:38,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:38,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:38,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:38,172 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:38,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:38,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:20 [2021-06-05 22:11:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:38,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307404346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:38,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:38,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:11:38,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381958727] [2021-06-05 22:11:38,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:11:38,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:38,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:11:38,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:11:38,240 INFO L87 Difference]: Start difference. First operand 758 states and 2573 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:38,934 INFO L93 Difference]: Finished difference Result 1686 states and 4934 transitions. [2021-06-05 22:11:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:11:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:38,936 INFO L225 Difference]: With dead ends: 1686 [2021-06-05 22:11:38,936 INFO L226 Difference]: Without dead ends: 1686 [2021-06-05 22:11:38,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:11:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-06-05 22:11:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 756. [2021-06-05 22:11:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.4013245033112582) internal successors, (2568), 755 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2568 transitions. [2021-06-05 22:11:38,947 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2568 transitions. Word has length 20 [2021-06-05 22:11:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:38,948 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2568 transitions. [2021-06-05 22:11:38,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2568 transitions. [2021-06-05 22:11:38,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:38,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:38,948 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:39,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7184 [2021-06-05 22:11:39,149 INFO L430 AbstractCegarLoop]: === Iteration 872 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:39,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:39,149 INFO L82 PathProgramCache]: Analyzing trace with hash 751762076, now seen corresponding path program 705 times [2021-06-05 22:11:39,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:39,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932448965] [2021-06-05 22:11:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:39,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932448965] [2021-06-05 22:11:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932448965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412109418] [2021-06-05 22:11:39,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:39,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:39,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:39,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:39,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:39,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:39,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,405 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-06-05 22:11:39,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:39,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:39,426 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 22:11:39,426 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-06-05 22:11:39,426 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:39,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:39,427 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:11:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:39,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412109418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:39,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:39,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:39,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515066860] [2021-06-05 22:11:39,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:39,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:39,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:39,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:39,490 INFO L87 Difference]: Start difference. First operand 756 states and 2568 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:39,778 INFO L93 Difference]: Finished difference Result 1371 states and 4238 transitions. [2021-06-05 22:11:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:39,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:39,780 INFO L225 Difference]: With dead ends: 1371 [2021-06-05 22:11:39,780 INFO L226 Difference]: Without dead ends: 1371 [2021-06-05 22:11:39,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-06-05 22:11:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 759. [2021-06-05 22:11:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.4076517150395778) internal successors, (2583), 758 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2583 transitions. [2021-06-05 22:11:39,790 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2583 transitions. Word has length 20 [2021-06-05 22:11:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:39,790 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2583 transitions. [2021-06-05 22:11:39,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2583 transitions. [2021-06-05 22:11:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:39,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:39,791 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:39,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7193 [2021-06-05 22:11:39,992 INFO L430 AbstractCegarLoop]: === Iteration 873 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1918867452, now seen corresponding path program 706 times [2021-06-05 22:11:39,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:39,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722140603] [2021-06-05 22:11:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:40,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:40,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722140603] [2021-06-05 22:11:40,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722140603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:40,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349448019] [2021-06-05 22:11:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:40,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:40,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:40,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:40,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:40,244 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 22:11:40,244 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-06-05 22:11:40,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:40,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:40,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:40,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:40,265 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 22:11:40,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:40,266 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 22:11:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:40,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349448019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:40,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:40,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:40,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275231435] [2021-06-05 22:11:40,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:40,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:40,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:40,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:40,323 INFO L87 Difference]: Start difference. First operand 759 states and 2583 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:40,614 INFO L93 Difference]: Finished difference Result 1332 states and 4148 transitions. [2021-06-05 22:11:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:11:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:40,616 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 22:11:40,616 INFO L226 Difference]: Without dead ends: 1332 [2021-06-05 22:11:40,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-05 22:11:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 754. [2021-06-05 22:11:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.394422310756972) internal successors, (2556), 753 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2556 transitions. [2021-06-05 22:11:40,632 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2556 transitions. Word has length 20 [2021-06-05 22:11:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:40,632 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2556 transitions. [2021-06-05 22:11:40,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2556 transitions. [2021-06-05 22:11:40,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:40,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:40,633 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:40,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 735 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7203 [2021-06-05 22:11:40,834 INFO L430 AbstractCegarLoop]: === Iteration 874 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1012979554, now seen corresponding path program 707 times [2021-06-05 22:11:40,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:40,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660252731] [2021-06-05 22:11:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:40,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:40,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660252731] [2021-06-05 22:11:40,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660252731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:40,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038601442] [2021-06-05 22:11:40,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:41,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:41,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:41,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:41,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:41,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:11:41,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:41,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:11:41,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:41,093 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-06-05 22:11:41,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 22:11:41,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:41,117 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 22:11:41,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-06-05 22:11:41,117 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 22:11:41,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:41,118 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 22:11:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:41,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038601442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:41,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:41,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:11:41,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179698852] [2021-06-05 22:11:41,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:11:41,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:41,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:11:41,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:11:41,157 INFO L87 Difference]: Start difference. First operand 754 states and 2556 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:41,380 INFO L93 Difference]: Finished difference Result 1327 states and 4080 transitions. [2021-06-05 22:11:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:11:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:11:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:41,382 INFO L225 Difference]: With dead ends: 1327 [2021-06-05 22:11:41,382 INFO L226 Difference]: Without dead ends: 1320 [2021-06-05 22:11:41,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-06-05 22:11:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 762. [2021-06-05 22:11:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.392904073587385) internal successors, (2582), 761 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2582 transitions. [2021-06-05 22:11:41,393 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2582 transitions. Word has length 20 [2021-06-05 22:11:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:41,393 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2582 transitions. [2021-06-05 22:11:41,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2582 transitions. [2021-06-05 22:11:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:11:41,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:41,394 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:41,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 736 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7214 [2021-06-05 22:11:41,594 INFO L430 AbstractCegarLoop]: === Iteration 875 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1354923270, now seen corresponding path program 708 times [2021-06-05 22:11:41,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:41,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364007763] [2021-06-05 22:11:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:41,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:41,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364007763] [2021-06-05 22:11:41,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364007763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:41,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502599008] [2021-06-05 22:11:41,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... [2021-06-05 22:11:41,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:41,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:41,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:41,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7225,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:41,984 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:11:41,985 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:11:41,987 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:11:41,987 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:11:41 BasicIcfg [2021-06-05 22:11:41,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:11:41,987 INFO L168 Benchmark]: Toolchain (without parser) took 856782.38 ms. Allocated memory was 358.6 MB in the beginning and 520.1 MB in the end (delta: 161.5 MB). Free memory was 337.7 MB in the beginning and 223.1 MB in the end (delta: 114.7 MB). Peak memory consumption was 277.4 MB. Max. memory is 16.0 GB. [2021-06-05 22:11:41,987 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 358.6 MB. Free memory was 339.1 MB in the beginning and 339.0 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:11:41,988 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.74 ms. Allocated memory is still 358.6 MB. Free memory was 337.7 MB in the beginning and 336.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:11:41,988 INFO L168 Benchmark]: Boogie Preprocessor took 29.26 ms. Allocated memory is still 358.6 MB. Free memory was 336.2 MB in the beginning and 335.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:11:41,988 INFO L168 Benchmark]: RCFGBuilder took 408.55 ms. Allocated memory is still 358.6 MB. Free memory was 335.0 MB in the beginning and 329.9 MB in the end (delta: 5.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. [2021-06-05 22:11:41,988 INFO L168 Benchmark]: TraceAbstraction took 856321.77 ms. Allocated memory was 358.6 MB in the beginning and 520.1 MB in the end (delta: 161.5 MB). Free memory was 328.9 MB in the beginning and 223.1 MB in the end (delta: 105.8 MB). Peak memory consumption was 268.4 MB. Max. memory is 16.0 GB. [2021-06-05 22:11:41,988 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 358.6 MB. Free memory was 339.1 MB in the beginning and 339.0 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.74 ms. Allocated memory is still 358.6 MB. Free memory was 337.7 MB in the beginning and 336.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.26 ms. Allocated memory is still 358.6 MB. Free memory was 336.2 MB in the beginning and 335.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 408.55 ms. Allocated memory is still 358.6 MB. Free memory was 335.0 MB in the beginning and 329.9 MB in the end (delta: 5.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 856321.77 ms. Allocated memory was 358.6 MB in the beginning and 520.1 MB in the end (delta: 161.5 MB). Free memory was 328.9 MB in the beginning and 223.1 MB in the end (delta: 105.8 MB). Peak memory consumption was 268.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 9 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 856232.1ms, OverallIterations: 875, TraceHistogramMax: 2, EmptinessCheckTime: 666.4ms, AutomataDifference: 435226.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 47926 SDtfs, 117151 SDslu, 263174 SDs, 0 SdLazy, 284580 SolverSat, 11575 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103937.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29720 GetRequests, 12406 SyntacticMatches, 309 SemanticMatches, 17005 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58714 ImplicationChecksByTransitivity, 423896.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=453, InterpolantAutomatonStates: 10714, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7518.6ms AutomataMinimizationTime, 874 MinimizatonAttempts, 304462 StatesRemovedByMinimization, 874 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3487.1ms SsaConstructionTime, 7693.4ms SatisfiabilityAnalysisTime, 196127.3ms InterpolantComputationTime, 31418 NumberOfCodeBlocks, 31418 NumberOfCodeBlocksAsserted, 2251 NumberOfCheckSat, 29809 ConstructedInterpolants, 0 QuantifiedInterpolants, 321104 SizeOfPredicates, 7169 NumberOfNonLiveVariables, 63900 ConjunctsInSsa, 16374 ConjunctsInUnsatCore, 1609 InterpolantComputations, 155 PerfectInterpolantSequences, 1847/5137 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown